diff --git a/dom/base/moz.build b/dom/base/moz.build
index 464a6a6147c..c3ba9c10684 100644
--- a/dom/base/moz.build
+++ b/dom/base/moz.build
@@ -403,7 +403,6 @@ LOCAL_INCLUDES += [
     '/dom/xslt/xpath',
     '/dom/xul',
     '/image/src',
-    '/js/ipc',
     '/js/xpconnect/src',
     '/js/xpconnect/wrappers',
     '/layout/base',
diff --git a/dom/base/nsFrameLoader.cpp b/dom/base/nsFrameLoader.cpp
index d782137e512..13e7f23897c 100644
--- a/dom/base/nsFrameLoader.cpp
+++ b/dom/base/nsFrameLoader.cpp
@@ -80,6 +80,7 @@
 #include "mozilla/Preferences.h"
 #include "mozilla/unused.h"
 #include "mozilla/dom/Element.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/layout/RenderFrameParent.h"
 #include "nsIAppsService.h"
 #include "GeckoProfiler.h"
@@ -88,7 +89,6 @@
 #include "mozilla/dom/HTMLIFrameElement.h"
 #include "mozilla/dom/SVGIFrameElement.h"
 #include "nsSandboxFlags.h"
-#include "JavaScriptParent.h"
 #include "mozilla/layers/CompositorChild.h"
 
 #include "mozilla/dom/StructuredCloneUtils.h"
diff --git a/dom/base/nsFrameMessageManager.cpp b/dom/base/nsFrameMessageManager.cpp
index a72893e154b..0559468b889 100644
--- a/dom/base/nsFrameMessageManager.cpp
+++ b/dom/base/nsFrameMessageManager.cpp
@@ -37,9 +37,8 @@
 #include "mozilla/dom/StructuredCloneUtils.h"
 #include "mozilla/dom/ipc/BlobChild.h"
 #include "mozilla/dom/ipc/BlobParent.h"
-#include "JavaScriptChild.h"
-#include "JavaScriptParent.h"
 #include "mozilla/dom/DOMStringList.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "nsPrintfCString.h"
 #include "nsXULAppAPI.h"
 #include <algorithm>
@@ -927,7 +926,7 @@ nsFrameMessageManager::ReceiveMessage(nsISupports* aTarget,
                                       const nsAString& aMessage,
                                       bool aIsSync,
                                       const StructuredCloneData* aCloneData,
-                                      CpowHolder* aCpows,
+                                      mozilla::jsipc::CpowHolder* aCpows,
                                       nsIPrincipal* aPrincipal,
                                       InfallibleTArray<nsString>* aJSONRetVal)
 {
diff --git a/dom/base/nsFrameMessageManager.h b/dom/base/nsFrameMessageManager.h
index 758643459bc..30708cf534f 100644
--- a/dom/base/nsFrameMessageManager.h
+++ b/dom/base/nsFrameMessageManager.h
@@ -28,6 +28,7 @@
 #include "js/RootingAPI.h"
 #include "nsTObserverArray.h"
 #include "mozilla/dom/StructuredCloneUtils.h"
+#include "mozilla/jsipc/CpowHolder.h"
 
 namespace mozilla {
 namespace dom {
@@ -134,13 +135,8 @@ struct nsMessageListenerInfo
   nsWeakPtr mWeakListener;
 };
 
-class CpowHolder
-{
-public:
-  virtual bool ToObject(JSContext* cx, JS::MutableHandle<JSObject*> objp) = 0;
-};
 
-class MOZ_STACK_CLASS SameProcessCpowHolder : public CpowHolder
+class MOZ_STACK_CLASS SameProcessCpowHolder : public mozilla::jsipc::CpowHolder
 {
 public:
   SameProcessCpowHolder(JSRuntime *aRuntime, JS::Handle<JSObject*> aObj)
@@ -230,7 +226,7 @@ public:
 
   nsresult ReceiveMessage(nsISupports* aTarget, const nsAString& aMessage,
                           bool aIsSync, const StructuredCloneData* aCloneData,
-                          CpowHolder* aCpows, nsIPrincipal* aPrincipal,
+                          mozilla::jsipc::CpowHolder* aCpows, nsIPrincipal* aPrincipal,
                           InfallibleTArray<nsString>* aJSONRetVal);
 
   void AddChildManager(nsFrameMessageManager* aManager);
diff --git a/dom/bindings/BindingUtils.cpp b/dom/bindings/BindingUtils.cpp
index 39fe8fd0844..c4a21f28a00 100644
--- a/dom/bindings/BindingUtils.cpp
+++ b/dom/bindings/BindingUtils.cpp
@@ -9,8 +9,6 @@
 #include <algorithm>
 #include <stdarg.h>
 
-#include "JavaScriptParent.h"
-
 #include "mozilla/DebugOnly.h"
 #include "mozilla/FloatingPoint.h"
 #include "mozilla/Assertions.h"
@@ -44,6 +42,7 @@
 #include "mozilla/dom/HTMLEmbedElementBinding.h"
 #include "mozilla/dom/HTMLAppletElementBinding.h"
 #include "mozilla/dom/Promise.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "WorkerPrivate.h"
 #include "nsDOMClassInfo.h"
 
diff --git a/dom/bindings/moz.build b/dom/bindings/moz.build
index 6e1c5db2b71..747fec2a7ee 100644
--- a/dom/bindings/moz.build
+++ b/dom/bindings/moz.build
@@ -58,7 +58,6 @@ LOCAL_INCLUDES += [
     '/dom/xslt/base',
     '/dom/xslt/xpath',
     '/dom/xul',
-    '/js/ipc',
     '/js/xpconnect/src',
     '/js/xpconnect/wrappers',
     '/layout/style',
diff --git a/dom/ipc/CPOWManagerGetter.h b/dom/ipc/CPOWManagerGetter.h
index ad16cda3475..c58d355843e 100644
--- a/dom/ipc/CPOWManagerGetter.h
+++ b/dom/ipc/CPOWManagerGetter.h
@@ -10,14 +10,14 @@
 namespace mozilla {
 
 namespace jsipc {
-class JavaScriptShared;
+class CPOWManager;
 } /* namespace jsipc */
 
 namespace dom {
 class CPOWManagerGetter
 {
 public:
-  virtual mozilla::jsipc::JavaScriptShared* GetCPOWManager() = 0;
+  virtual mozilla::jsipc::CPOWManager* GetCPOWManager() = 0;
 };
 } /* namespace dom */
 
diff --git a/dom/ipc/ContentBridgeChild.cpp b/dom/ipc/ContentBridgeChild.cpp
index b3ea951cb52..16077c97489 100644
--- a/dom/ipc/ContentBridgeChild.cpp
+++ b/dom/ipc/ContentBridgeChild.cpp
@@ -10,8 +10,8 @@
 #include "mozilla/dom/StructuredCloneUtils.h"
 #include "mozilla/dom/TabChild.h"
 #include "mozilla/dom/ipc/BlobChild.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/ipc/InputStreamUtils.h"
-#include "JavaScriptChild.h"
 
 using namespace base;
 using namespace mozilla::ipc;
@@ -100,14 +100,13 @@ ContentBridgeChild::SendPBrowserConstructor(PBrowserChild* aActor,
 // This implementation is identical to ContentChild::GetCPOWManager but we can't
 // move it to nsIContentChild because it calls ManagedPJavaScriptChild() which
 // only exists in PContentChild and PContentBridgeChild.
-jsipc::JavaScriptShared*
+jsipc::CPOWManager*
 ContentBridgeChild::GetCPOWManager()
 {
   if (ManagedPJavaScriptChild().Length()) {
-    return static_cast<JavaScriptChild*>(ManagedPJavaScriptChild()[0]);
+    return CPOWManagerFor(ManagedPJavaScriptChild()[0]);
   }
-  JavaScriptChild* actor = static_cast<JavaScriptChild*>(SendPJavaScriptConstructor());
-  return actor;
+  return CPOWManagerFor(SendPJavaScriptConstructor());
 }
 
 mozilla::jsipc::PJavaScriptChild *
diff --git a/dom/ipc/ContentBridgeChild.h b/dom/ipc/ContentBridgeChild.h
index ede302fae4c..1e7844cf8f2 100644
--- a/dom/ipc/ContentBridgeChild.h
+++ b/dom/ipc/ContentBridgeChild.h
@@ -36,7 +36,7 @@ public:
   SendPBlobConstructor(PBlobChild* actor,
                        const BlobConstructorParams& aParams) MOZ_OVERRIDE;
 
-  jsipc::JavaScriptShared* GetCPOWManager() MOZ_OVERRIDE;
+  jsipc::CPOWManager* GetCPOWManager() MOZ_OVERRIDE;
 
   virtual bool SendPBrowserConstructor(PBrowserChild* aActor,
                                        const TabId& aTabId,
diff --git a/dom/ipc/ContentBridgeParent.cpp b/dom/ipc/ContentBridgeParent.cpp
index 2d98c9710a9..216dde0f9bf 100644
--- a/dom/ipc/ContentBridgeParent.cpp
+++ b/dom/ipc/ContentBridgeParent.cpp
@@ -6,7 +6,7 @@
 
 #include "mozilla/dom/ContentBridgeParent.h"
 #include "mozilla/dom/TabParent.h"
-#include "JavaScriptParent.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "nsXULAppAPI.h"
 
 using namespace base;
@@ -154,14 +154,13 @@ ContentBridgeParent::DeallocPBrowserParent(PBrowserParent* aParent)
 // This implementation is identical to ContentParent::GetCPOWManager but we can't
 // move it to nsIContentParent because it calls ManagedPJavaScriptParent() which
 // only exists in PContentParent and PContentBridgeParent.
-jsipc::JavaScriptShared*
+jsipc::CPOWManager*
 ContentBridgeParent::GetCPOWManager()
 {
   if (ManagedPJavaScriptParent().Length()) {
-    return static_cast<JavaScriptParent*>(ManagedPJavaScriptParent()[0]);
+    return CPOWManagerFor(ManagedPJavaScriptParent()[0]);
   }
-  JavaScriptParent* actor = static_cast<JavaScriptParent*>(SendPJavaScriptConstructor());
-  return actor;
+  return CPOWManagerFor(SendPJavaScriptConstructor());
 }
 
 } // namespace dom
diff --git a/dom/ipc/ContentBridgeParent.h b/dom/ipc/ContentBridgeParent.h
index e9d3e9a2194..4dc784afe1f 100644
--- a/dom/ipc/ContentBridgeParent.h
+++ b/dom/ipc/ContentBridgeParent.h
@@ -41,7 +41,7 @@ public:
                           const bool& aIsForApp,
                           const bool& aIsForBrowser) MOZ_OVERRIDE;
 
-  jsipc::JavaScriptShared* GetCPOWManager() MOZ_OVERRIDE;
+  jsipc::CPOWManager* GetCPOWManager() MOZ_OVERRIDE;
 
   virtual ContentParentId ChildID() MOZ_OVERRIDE
   {
diff --git a/dom/ipc/ContentChild.cpp b/dom/ipc/ContentChild.cpp
index 4df3de57377..6cc156fc801 100644
--- a/dom/ipc/ContentChild.cpp
+++ b/dom/ipc/ContentChild.cpp
@@ -41,6 +41,7 @@
 #include "mozilla/ipc/FileDescriptorUtils.h"
 #include "mozilla/ipc/GeckoChildProcessHost.h"
 #include "mozilla/ipc/TestShellChild.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/layers/CompositorChild.h"
 #include "mozilla/layers/ImageBridgeChild.h"
 #include "mozilla/layers/PCompositorChild.h"
@@ -163,7 +164,6 @@
 #include "nsIPrincipal.h"
 #include "nsDeviceStorage.h"
 #include "AudioChannelService.h"
-#include "JavaScriptChild.h"
 #include "mozilla/dom/DataStoreService.h"
 #include "mozilla/dom/telephony/PTelephonyChild.h"
 #include "mozilla/dom/time/DateCacheCleaner.h"
@@ -1403,14 +1403,13 @@ ContentChild::DeallocPTestShellChild(PTestShellChild* shell)
     return true;
 }
 
-jsipc::JavaScriptShared*
+jsipc::CPOWManager*
 ContentChild::GetCPOWManager()
 {
     if (ManagedPJavaScriptChild().Length()) {
-        return static_cast<JavaScriptChild*>(ManagedPJavaScriptChild()[0]);
+        return CPOWManagerFor(ManagedPJavaScriptChild()[0]);
     }
-    JavaScriptChild* actor = static_cast<JavaScriptChild*>(SendPJavaScriptConstructor());
-    return actor;
+    return CPOWManagerFor(SendPJavaScriptConstructor());
 }
 
 bool
diff --git a/dom/ipc/ContentChild.h b/dom/ipc/ContentChild.h
index 0e76e01059c..cf9b7e7434b 100644
--- a/dom/ipc/ContentChild.h
+++ b/dom/ipc/ContentChild.h
@@ -209,7 +209,7 @@ public:
     virtual PTestShellChild* AllocPTestShellChild() MOZ_OVERRIDE;
     virtual bool DeallocPTestShellChild(PTestShellChild*) MOZ_OVERRIDE;
     virtual bool RecvPTestShellConstructor(PTestShellChild*) MOZ_OVERRIDE;
-    jsipc::JavaScriptShared* GetCPOWManager() MOZ_OVERRIDE;
+    jsipc::CPOWManager* GetCPOWManager() MOZ_OVERRIDE;
 
     PMobileConnectionChild*
     SendPMobileConnectionConstructor(PMobileConnectionChild* aActor,
diff --git a/dom/ipc/ContentParent.cpp b/dom/ipc/ContentParent.cpp
index 7ecbf3c5fb3..77e0a0f80bc 100755
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -67,6 +67,7 @@
 #include "mozilla/ipc/PFileDescriptorSetParent.h"
 #include "mozilla/ipc/TestShellParent.h"
 #include "mozilla/ipc/InputStreamUtils.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/layers/CompositorParent.h"
 #include "mozilla/layers/ImageBridgeParent.h"
 #include "mozilla/layers/SharedBufferManagerParent.h"
@@ -178,8 +179,6 @@ using namespace mozilla::system;
 #include "BluetoothService.h"
 #endif
 
-#include "JavaScriptParent.h"
-
 #include "mozilla/RemoteSpellCheckEngineParent.h"
 
 #ifdef MOZ_B2G_FM
@@ -1996,11 +1995,11 @@ ContentParent::NotifyTabDestroyed(PBrowserParent* aTab,
     }
 }
 
-jsipc::JavaScriptShared*
+jsipc::CPOWManager*
 ContentParent::GetCPOWManager()
 {
     if (ManagedPJavaScriptParent().Length()) {
-        return static_cast<JavaScriptParent*>(ManagedPJavaScriptParent()[0]);
+        return CPOWManagerFor(ManagedPJavaScriptParent()[0]);
     }
     return nullptr;
 }
diff --git a/dom/ipc/ContentParent.h b/dom/ipc/ContentParent.h
index c2bb0570586..7e486f7c671 100644
--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@@ -189,7 +189,7 @@ public:
     TestShellParent* CreateTestShell();
     bool DestroyTestShell(TestShellParent* aTestShell);
     TestShellParent* GetTestShellSingleton();
-    jsipc::JavaScriptShared* GetCPOWManager() MOZ_OVERRIDE;
+    jsipc::CPOWManager* GetCPOWManager() MOZ_OVERRIDE;
 
     static TabId
     AllocateTabId(const TabId& aOpenerTabId,
diff --git a/dom/ipc/TabChild.cpp b/dom/ipc/TabChild.cpp
index 6fc26e3eff8..1a281cef24a 100644
--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -75,7 +75,6 @@
 #include "PuppetWidget.h"
 #include "StructuredCloneUtils.h"
 #include "nsViewportInfo.h"
-#include "JavaScriptChild.h"
 #include "nsILoadContext.h"
 #include "ipc/nsGUIEventIPC.h"
 #include "mozilla/gfx/Matrix.h"
diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index def22ab56c4..9e860dfb9ad 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -18,6 +18,7 @@
 #include "mozilla/EventStateManager.h"
 #include "mozilla/Hal.h"
 #include "mozilla/ipc/DocumentRendererParent.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/layers/CompositorParent.h"
 #include "mozilla/layers/InputAPZContext.h"
 #include "mozilla/layout/RenderFrameParent.h"
@@ -65,7 +66,6 @@
 #include "PermissionMessageUtils.h"
 #include "StructuredCloneUtils.h"
 #include "ColorPickerParent.h"
-#include "JavaScriptParent.h"
 #include "FilePickerParent.h"
 #include "TabChild.h"
 #include "LoadContext.h"
diff --git a/dom/ipc/TabParent.h b/dom/ipc/TabParent.h
index b516291dbe4..044f1eaa28c 100644
--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -29,11 +29,14 @@ class nsIPrincipal;
 class nsIURI;
 class nsIWidget;
 class nsILoadContext;
-class CpowHolder;
 class nsIDocShell;
 
 namespace mozilla {
 
+namespace jsipc {
+class CpowHolder;
+}
+
 namespace layers {
 struct FrameMetrics;
 struct TextureFactoryIdentifier;
@@ -363,7 +366,7 @@ protected:
     bool ReceiveMessage(const nsString& aMessage,
                         bool aSync,
                         const StructuredCloneData* aCloneData,
-                        CpowHolder* aCpows,
+                        mozilla::jsipc::CpowHolder* aCpows,
                         nsIPrincipal* aPrincipal,
                         InfallibleTArray<nsString>* aJSONRetVal = nullptr);
 
diff --git a/dom/ipc/moz.build b/dom/ipc/moz.build
index 9ed23bb8ec0..15ccd291fbe 100644
--- a/dom/ipc/moz.build
+++ b/dom/ipc/moz.build
@@ -130,7 +130,6 @@ LOCAL_INCLUDES += [
     '/extensions/cookie',
     '/extensions/spellcheck/src',
     '/hal/sandbox',
-    '/js/ipc',
     '/layout/base',
     '/netwerk/base',
     '/toolkit/xre',
diff --git a/dom/ipc/nsIContentChild.cpp b/dom/ipc/nsIContentChild.cpp
index bcbedc01803..afcd7f2baa1 100644
--- a/dom/ipc/nsIContentChild.cpp
+++ b/dom/ipc/nsIContentChild.cpp
@@ -15,7 +15,6 @@
 #include "mozilla/dom/ipc/BlobChild.h"
 #include "mozilla/ipc/InputStreamUtils.h"
 
-#include "JavaScriptChild.h"
 #include "nsIJSRuntimeService.h"
 #include "nsPrintfCString.h"
 
@@ -35,17 +34,13 @@ nsIContentChild::AllocPJavaScriptChild()
   svc->GetRuntime(&rt);
   NS_ENSURE_TRUE(svc, nullptr);
 
-  nsAutoPtr<JavaScriptChild> child(new JavaScriptChild(rt));
-  if (!child->init()) {
-    return nullptr;
-  }
-  return child.forget();
+  return NewJavaScriptChild(rt);
 }
 
 bool
 nsIContentChild::DeallocPJavaScriptChild(PJavaScriptChild* aChild)
 {
-  static_cast<JavaScriptChild*>(aChild)->decref();
+  ReleaseJavaScriptChild(aChild);
   return true;
 }
 
diff --git a/dom/ipc/nsIContentParent.cpp b/dom/ipc/nsIContentParent.cpp
index 93e567875de..8fcbafb882c 100644
--- a/dom/ipc/nsIContentParent.cpp
+++ b/dom/ipc/nsIContentParent.cpp
@@ -15,9 +15,9 @@
 #include "mozilla/dom/StructuredCloneUtils.h"
 #include "mozilla/dom/TabParent.h"
 #include "mozilla/dom/ipc/BlobParent.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/unused.h"
 
-#include "JavaScriptParent.h"
 #include "nsFrameMessageManager.h"
 #include "nsIJSRuntimeService.h"
 #include "nsPrintfCString.h"
@@ -57,17 +57,13 @@ nsIContentParent::AllocPJavaScriptParent()
   svc->GetRuntime(&rt);
   NS_ENSURE_TRUE(svc, nullptr);
 
-  nsAutoPtr<JavaScriptParent> parent(new JavaScriptParent(rt));
-  if (!parent->init()) {
-    return nullptr;
-  }
-  return parent.forget();
+  return NewJavaScriptParent(rt);
 }
 
 bool
 nsIContentParent::DeallocPJavaScriptParent(PJavaScriptParent* aParent)
 {
-  static_cast<JavaScriptParent*>(aParent)->decref();
+  ReleaseJavaScriptParent(aParent);
   return true;
 }
 
diff --git a/js/ipc/CpowHolder.h b/js/ipc/CpowHolder.h
new file mode 100644
index 00000000000..2be878f3908
--- /dev/null
+++ b/js/ipc/CpowHolder.h
@@ -0,0 +1,25 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sw=4 et tw=80:
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_jsipc_CpowHolder_h__
+#define mozilla_jsipc_CpowHolder_h__
+
+#include "js/TypeDecls.h"
+
+namespace mozilla {
+namespace jsipc {
+
+class CpowHolder
+{
+  public:
+    virtual bool ToObject(JSContext* cx, JS::MutableHandle<JSObject*> objp) = 0;
+};
+
+} // namespace jsipc
+} // namespace mozilla
+
+#endif // mozilla_jsipc_CpowHolder_h__
diff --git a/js/ipc/CrossProcessObjectWrappers.h b/js/ipc/CrossProcessObjectWrappers.h
new file mode 100644
index 00000000000..da083693946
--- /dev/null
+++ b/js/ipc/CrossProcessObjectWrappers.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sw=4 et tw=80:
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_jsipc_CrossProcessObjectWrappers_h__
+#define mozilla_jsipc_CrossProcessObjectWrappers_h__
+
+#include "js/TypeDecls.h"
+#include "mozilla/jsipc/CpowHolder.h"
+#include "mozilla/jsipc/JavaScriptTypes.h"
+#include "nsID.h"
+#include "nsString.h"
+#include "nsTArray.h"
+
+#ifdef XP_WIN
+#undef GetClassName
+#undef GetClassInfo
+#endif
+
+namespace mozilla {
+
+namespace dom {
+class CPOWManagerGetter;
+}
+
+namespace jsipc {
+
+class PJavaScriptParent;
+class PJavaScriptChild;
+
+class CPOWManager
+{
+  public:
+    virtual bool Unwrap(JSContext *cx,
+                        const InfallibleTArray<CpowEntry> &aCpows,
+                        JS::MutableHandleObject objp) = 0;
+
+    virtual bool Wrap(JSContext *cx,
+                      JS::HandleObject aObj,
+                      InfallibleTArray<CpowEntry> *outCpows) = 0;
+};
+
+class CpowIdHolder : public CpowHolder
+{
+  public:
+    CpowIdHolder(dom::CPOWManagerGetter *managerGetter, const InfallibleTArray<CpowEntry> &cpows);
+
+    bool ToObject(JSContext *cx, JS::MutableHandleObject objp);
+
+  private:
+    CPOWManager *js_;
+    const InfallibleTArray<CpowEntry> &cpows_;
+};
+
+CPOWManager*
+CPOWManagerFor(PJavaScriptParent* aParent);
+
+CPOWManager*
+CPOWManagerFor(PJavaScriptChild* aChild);
+
+bool
+IsCPOW(JSObject *obj);
+
+bool
+IsWrappedCPOW(JSObject *obj);
+
+nsresult
+InstanceOf(JSObject *obj, const nsID *id, bool *bp);
+
+bool
+DOMInstanceOf(JSContext *cx, JSObject *obj, int prototypeID, int depth, bool *bp);
+
+void
+GetWrappedCPOWTag(JSObject *obj, nsACString &out);
+
+PJavaScriptParent *
+NewJavaScriptParent(JSRuntime *rt);
+
+void
+ReleaseJavaScriptParent(PJavaScriptParent *parent);
+
+PJavaScriptChild *
+NewJavaScriptChild(JSRuntime *rt);
+
+void
+ReleaseJavaScriptChild(PJavaScriptChild *child);
+
+} // namespace jsipc
+} // namespace mozilla
+
+#endif // mozilla_jsipc_CrossProcessObjectWrappers_h__
diff --git a/js/ipc/JavaScriptChild.cpp b/js/ipc/JavaScriptChild.cpp
index 1ed45d1f1db..1a8f6d53b71 100644
--- a/js/ipc/JavaScriptChild.cpp
+++ b/js/ipc/JavaScriptChild.cpp
@@ -64,3 +64,20 @@ JavaScriptChild::scopeForTargetObjects()
     // scope so that they can benefit from XrayWrappers in the child.
     return xpc::PrivilegedJunkScope();
 }
+
+PJavaScriptChild *
+mozilla::jsipc::NewJavaScriptChild(JSRuntime *rt)
+{
+    JavaScriptChild *child = new JavaScriptChild(rt);
+    if (!child->init()) {
+        delete child;
+        return nullptr;
+    }
+    return child;
+}
+
+void
+mozilla::jsipc::ReleaseJavaScriptChild(PJavaScriptChild *child)
+{
+    static_cast<JavaScriptChild *>(child)->decref();
+}
diff --git a/js/ipc/JavaScriptParent.cpp b/js/ipc/JavaScriptParent.cpp
index 3411c537bc5..b1b1f39d47d 100644
--- a/js/ipc/JavaScriptParent.cpp
+++ b/js/ipc/JavaScriptParent.cpp
@@ -76,3 +76,20 @@ JavaScriptParent::CloneProtocol(Channel* aChannel, ProtocolCloneContext* aCtx)
     }
     return actor.forget();
 }
+
+PJavaScriptParent *
+mozilla::jsipc::NewJavaScriptParent(JSRuntime *rt)
+{
+    JavaScriptParent *parent = new JavaScriptParent(rt);
+    if (!parent->init()) {
+        delete parent;
+        return nullptr;
+    }
+    return parent;
+}
+
+void
+mozilla::jsipc::ReleaseJavaScriptParent(PJavaScriptParent *parent)
+{
+    static_cast<JavaScriptParent *>(parent)->decref();
+}
diff --git a/js/ipc/JavaScriptShared.cpp b/js/ipc/JavaScriptShared.cpp
index 147f28fcfd5..e7e14b7d773 100644
--- a/js/ipc/JavaScriptShared.cpp
+++ b/js/ipc/JavaScriptShared.cpp
@@ -757,3 +757,15 @@ JavaScriptShared::Wrap(JSContext *cx, HandleObject aObj, InfallibleTArray<CpowEn
 
     return true;
 }
+
+CPOWManager*
+mozilla::jsipc::CPOWManagerFor(PJavaScriptParent* aParent)
+{
+    return static_cast<JavaScriptParent *>(aParent);
+}
+
+CPOWManager*
+mozilla::jsipc::CPOWManagerFor(PJavaScriptChild* aChild)
+{
+    return static_cast<JavaScriptChild *>(aChild);
+}
diff --git a/js/ipc/JavaScriptShared.h b/js/ipc/JavaScriptShared.h
index fb381680b94..77c71c0083e 100644
--- a/js/ipc/JavaScriptShared.h
+++ b/js/ipc/JavaScriptShared.h
@@ -9,9 +9,9 @@
 #define mozilla_jsipc_JavaScriptShared_h__
 
 #include "mozilla/dom/DOMTypes.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/jsipc/PJavaScript.h"
 #include "nsJSUtils.h"
-#include "nsFrameMessageManager.h"
 
 namespace mozilla {
 
@@ -65,18 +65,6 @@ class ObjectId {
 
 class JavaScriptShared;
 
-class CpowIdHolder : public CpowHolder
-{
-  public:
-    CpowIdHolder(dom::CPOWManagerGetter *managerGetter, const InfallibleTArray<CpowEntry> &cpows);
-
-    bool ToObject(JSContext *cx, JS::MutableHandleObject objp);
-
-  private:
-    JavaScriptShared *js_;
-    const InfallibleTArray<CpowEntry> &cpows_;
-};
-
 // DefaultHasher<T> requires that T coerce to an integral type. We could make
 // ObjectId do that, but doing so would weaken our type invariants, so we just
 // reimplement it manually.
@@ -144,7 +132,7 @@ class ObjectToIdMap
 
 class Logging;
 
-class JavaScriptShared
+class JavaScriptShared : public CPOWManager
 {
   public:
     explicit JavaScriptShared(JSRuntime *rt);
diff --git a/js/ipc/WrapperOwner.h b/js/ipc/WrapperOwner.h
index d95b1d9a2cf..db8a778a230 100644
--- a/js/ipc/WrapperOwner.h
+++ b/js/ipc/WrapperOwner.h
@@ -10,14 +10,10 @@
 
 #include "JavaScriptShared.h"
 #include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "js/Class.h"
 #include "jsproxy.h"
 
-#ifdef XP_WIN
-#undef GetClassName
-#undef GetClassInfo
-#endif
-
 namespace mozilla {
 namespace jsipc {
 
@@ -149,21 +145,6 @@ class WrapperOwner : public virtual JavaScriptShared
                                    ReturnStatus *rs, bool *instanceof) = 0;
 };
 
-bool
-IsCPOW(JSObject *obj);
-
-bool
-IsWrappedCPOW(JSObject *obj);
-
-nsresult
-InstanceOf(JSObject *obj, const nsID *id, bool *bp);
-
-bool
-DOMInstanceOf(JSContext *cx, JSObject *obj, int prototypeID, int depth, bool *bp);
-
-void
-GetWrappedCPOWTag(JSObject *obj, nsACString &out);
-
 } // jsipc
 } // mozilla
 
diff --git a/js/ipc/moz.build b/js/ipc/moz.build
index 404795f9d66..7a8a2231914 100644
--- a/js/ipc/moz.build
+++ b/js/ipc/moz.build
@@ -26,6 +26,11 @@ FINAL_LIBRARY = 'xul'
 
 DEFINES['BIN_SUFFIX'] = '"%s"' % CONFIG['BIN_SUFFIX']
 
+EXPORTS.mozilla.jsipc = [
+    'CpowHolder.h',
+    'CrossProcessObjectWrappers.h',
+]
+
 LOCAL_INCLUDES += [
     '/dom/base',
     '/js/ipc',
diff --git a/js/xpconnect/src/XPCComponents.cpp b/js/xpconnect/src/XPCComponents.cpp
index 2273f8aac0a..f981562caef 100644
--- a/js/xpconnect/src/XPCComponents.cpp
+++ b/js/xpconnect/src/XPCComponents.cpp
@@ -13,10 +13,10 @@
 #include "nsJSUtils.h"
 #include "mozJSComponentLoader.h"
 #include "nsContentUtils.h"
-#include "JavaScriptParent.h"
 #include "jsfriendapi.h"
 #include "js/StructuredClone.h"
 #include "mozilla/Attributes.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/Preferences.h"
 #include "nsJSEnvironment.h"
 #include "mozilla/TimeStamp.h"
diff --git a/js/xpconnect/src/XPCConvert.cpp b/js/xpconnect/src/XPCConvert.cpp
index 40379f9b199..1d0d48edb47 100644
--- a/js/xpconnect/src/XPCConvert.cpp
+++ b/js/xpconnect/src/XPCConvert.cpp
@@ -21,11 +21,11 @@
 #include "jsfriendapi.h"
 #include "js/CharacterEncoding.h"
 #include "jsprf.h"
-#include "JavaScriptParent.h"
 
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/DOMException.h"
 #include "mozilla/dom/PrimitiveConversions.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 
 using namespace xpc;
 using namespace mozilla;
diff --git a/js/xpconnect/src/XPCJSID.cpp b/js/xpconnect/src/XPCJSID.cpp
index a8d7d24bd5c..71e018da10e 100644
--- a/js/xpconnect/src/XPCJSID.cpp
+++ b/js/xpconnect/src/XPCJSID.cpp
@@ -9,7 +9,7 @@
 #include "xpcprivate.h"
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/Attributes.h"
-#include "JavaScriptParent.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/StaticPtr.h"
 
 using namespace mozilla::dom;
diff --git a/js/xpconnect/src/XPCWrappedJS.cpp b/js/xpconnect/src/XPCWrappedJS.cpp
index f4d569e8bcd..ba5386a3eb8 100644
--- a/js/xpconnect/src/XPCWrappedJS.cpp
+++ b/js/xpconnect/src/XPCWrappedJS.cpp
@@ -8,10 +8,10 @@
 
 #include "xpcprivate.h"
 #include "jsprf.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "nsCCUncollectableMarker.h"
 #include "nsContentUtils.h"
 #include "nsThreadUtils.h"
-#include "JavaScriptParent.h"
 
 using namespace mozilla;
 
diff --git a/js/xpconnect/src/XPCWrappedJSClass.cpp b/js/xpconnect/src/XPCWrappedJSClass.cpp
index 1474aec1302..5f5db108314 100644
--- a/js/xpconnect/src/XPCWrappedJSClass.cpp
+++ b/js/xpconnect/src/XPCWrappedJSClass.cpp
@@ -13,11 +13,11 @@
 #include "nsWrapperCache.h"
 #include "AccessCheck.h"
 #include "nsJSUtils.h"
-#include "JavaScriptParent.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/DOMException.h"
 #include "mozilla/dom/DOMExceptionBinding.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 
 #include "jsapi.h"
 #include "jsfriendapi.h"
diff --git a/js/xpconnect/src/moz.build b/js/xpconnect/src/moz.build
index bcb089b1d60..4afe4dd15c7 100644
--- a/js/xpconnect/src/moz.build
+++ b/js/xpconnect/src/moz.build
@@ -66,7 +66,6 @@ LOCAL_INCLUDES += [
     '/dom/html',
     '/dom/svg',
     '/dom/workers',
-    '/js/ipc',
     '/layout/base',
     '/layout/style',
     '/xpcom/reflect/xptinfo',
diff --git a/js/xpconnect/wrappers/AccessCheck.cpp b/js/xpconnect/wrappers/AccessCheck.cpp
index 7cd922a4c41..4e0ae7151cf 100644
--- a/js/xpconnect/wrappers/AccessCheck.cpp
+++ b/js/xpconnect/wrappers/AccessCheck.cpp
@@ -8,7 +8,6 @@
 
 #include "nsJSPrincipals.h"
 #include "nsGlobalWindow.h"
-#include "JavaScriptParent.h"
 
 #include "XPCWrapper.h"
 #include "XrayWrapper.h"
@@ -17,6 +16,7 @@
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/LocationBinding.h"
 #include "mozilla/dom/WindowBinding.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "nsIDOMWindowCollection.h"
 #include "nsJSUtils.h"
 
diff --git a/js/xpconnect/wrappers/WrapperFactory.cpp b/js/xpconnect/wrappers/WrapperFactory.cpp
index 0d8eee539c7..9768f669f7f 100644
--- a/js/xpconnect/wrappers/WrapperFactory.cpp
+++ b/js/xpconnect/wrappers/WrapperFactory.cpp
@@ -16,8 +16,8 @@
 #include "xpcprivate.h"
 #include "XPCMaps.h"
 #include "mozilla/dom/BindingUtils.h"
-#include "JavaScriptParent.h"
 #include "jsfriendapi.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/Likely.h"
 #include "nsContentUtils.h"
 #include "nsXULAppAPI.h"
diff --git a/js/xpconnect/wrappers/moz.build b/js/xpconnect/wrappers/moz.build
index 33bb86edff8..d6a8c1c2e9f 100644
--- a/js/xpconnect/wrappers/moz.build
+++ b/js/xpconnect/wrappers/moz.build
@@ -39,6 +39,5 @@ FINAL_LIBRARY = 'xul'
 LOCAL_INCLUDES += [
     '../../../dom/base',
     '../src',
-    '/js/ipc',
 ]