Bug 1044736 - Part 2. Add nsIBrowserElementAPI.idl and implement nsBrowserElement. r=bz

b2g/installer/package-manifest.in

@@ -132,6 +132,7 @@
 @BINPATH@/components/autocomplete.xpt
 @BINPATH@/components/autoconfig.xpt
 @BINPATH@/components/browsercompsbase.xpt
+@BINPATH@/components/browser-element.xpt
 @BINPATH@/components/browser-feeds.xpt
 @BINPATH@/components/caps.xpt
 @BINPATH@/components/chardet.xpt

browser/installer/package-manifest.in

@@ -177,6 +177,7 @@
 @BINPATH@/components/appstartup.xpt
 @BINPATH@/components/autocomplete.xpt
 @BINPATH@/components/autoconfig.xpt
+@BINPATH@/components/browser-element.xpt
 @BINPATH@/browser/components/browsercompsbase.xpt
 @BINPATH@/browser/components/browser-feeds.xpt
 @BINPATH@/components/caps.xpt

dom/browser-element/moz.build

@@ -12,6 +12,12 @@ SOURCES += [
     'BrowserElementParent.cpp',
 ]
 
+XPIDL_SOURCES += [
+    'nsIBrowserElementAPI.idl',
+]
+
+XPIDL_MODULE = 'browser-element'
+
 EXTRA_COMPONENTS += [
     'BrowserElementParent.js',
     'BrowserElementParent.manifest',

dom/browser-element/nsIBrowserElementAPI.idl

@@ -0,0 +1,74 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIDOMDOMRequest;
+interface nsIFrameLoader;
+
+[scriptable, function, uuid(c0c2dd9b-41ef-42dd-a4c1-e456619c1941)]
+interface nsIBrowserElementNextPaintListener : nsISupports
+{
+  void recvNextPaint();
+};
+
+%{C++
+#define BROWSER_ELEMENT_API_CONTRACTID "@mozilla.org/dom/browser-element-api;1"
+#define BROWSER_ELEMENT_API_CID                                 \
+    { 0x651db7e3, 0x1734, 0x4536,                               \
+      { 0xb1, 0x5a, 0x5b, 0x3a, 0xe6, 0x44, 0x13, 0x4c } }
+%}
+
+/**
+ * Interface to the BrowserElementParent implementation. All methods
+ * but setFrameLoader throw when the remote process is dead.
+ */
+[scriptable, uuid(abae4fb1-7d6f-4e3f-b435-6501f1d4c659)]
+interface nsIBrowserElementAPI : nsISupports
+{
+  void setFrameLoader(in nsIFrameLoader frameLoader);
+
+  void setVisible(in boolean visible);
+  nsIDOMDOMRequest getVisible();
+  void setActive(in boolean active);
+  boolean getActive();
+
+  void sendMouseEvent(in DOMString type,
+                      in uint32_t x,
+                      in uint32_t y,
+                      in uint32_t button,
+                      in uint32_t clickCount,
+                      in uint32_t mifiers);
+  void sendTouchEvent(in DOMString aType,
+                      [const, array, size_is(count)] in uint32_t aIdentifiers,
+                      [const, array, size_is(count)] in int32_t aXs,
+                      [const, array, size_is(count)] in int32_t aYs,
+                      [const, array, size_is(count)] in uint32_t aRxs,
+                      [const, array, size_is(count)] in uint32_t aRys,
+                      [const, array, size_is(count)] in float aRotationAngles,
+                      [const, array, size_is(count)] in float aForces,
+                      in uint32_t count,
+                      in long aModifiers);
+  void goBack();
+  void goForward();
+  void reload(in boolean hardReload);
+  void stop();
+  nsIDOMDOMRequest download(in DOMString url,
+                            [optional] in jsval options);
+  nsIDOMDOMRequest purgeHistory();
+  nsIDOMDOMRequest getScreenshot(in uint32_t width,
+                                 in uint32_t height,
+                                 [optional] in DOMString mimeType);
+  void zoom(in float zoom);
+  nsIDOMDOMRequest getCanGoBack();
+  nsIDOMDOMRequest getCanGoForward();
+  nsIDOMDOMRequest getContentDimensions();
+
+  void addNextPaintListener(in nsIBrowserElementNextPaintListener listener);
+  void removeNextPaintListener(in nsIBrowserElementNextPaintListener listener);
+
+  nsIDOMDOMRequest setInputMethodActive(in boolean isActive);
+};

dom/html/nsBrowserElement.cpp

@@ -6,38 +6,200 @@
 
 #include "nsBrowserElement.h"
 
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
 #include "mozilla/dom/BrowserElementBinding.h"
 #include "mozilla/dom/DOMRequest.h"
-#include "mozilla/Preferences.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/ToJSValue.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsContentUtils.h"
+#include "nsFrameLoader.h"
+#include "nsIDOMDOMRequest.h"
+#include "nsIDOMElement.h"
+#include "nsINode.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsIPrincipal.h"
+#include "nsWeakReference.h"
+
+using namespace mozilla::dom;
 
 namespace mozilla {
 
+static const char kRemoteBrowserPending[] = "remote-browser-pending";
+static const char kInprocessBrowserShown[] = "inprocess-browser-shown";
+
+class nsBrowserElement::BrowserShownObserver : public nsIObserver
+                                             , public nsSupportsWeakReference
+{
+public:
+  BrowserShownObserver(nsBrowserElement* aBrowserElement);
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+  void AddObserver();
+  void RemoveObserver();
+private:
+  virtual ~BrowserShownObserver();
+
+  // Weak reference to the browser element. nsBrowserElement has a
+  // reference to us. nsBrowserElement's destructor is responsible to
+  // null out this weak reference via RemoveObserver()
+  nsBrowserElement* mBrowserElement;
+};
+
+NS_IMPL_ISUPPORTS(nsBrowserElement::BrowserShownObserver, nsIObserver, nsISupportsWeakReference)
+
+nsBrowserElement::BrowserShownObserver::BrowserShownObserver(nsBrowserElement* aBrowserElement)
+  : mBrowserElement(aBrowserElement)
+{
+}
+
+nsBrowserElement::BrowserShownObserver::~BrowserShownObserver()
+{
+  RemoveObserver();
+}
+
+NS_IMETHODIMP
+nsBrowserElement::BrowserShownObserver::Observe(nsISupports* aSubject,
+                                                const char* aTopic,
+                                                const char16_t* aData)
+{
+  NS_ENSURE_TRUE(mBrowserElement, NS_OK);
+
+  if (!strcmp(aTopic, kRemoteBrowserPending) ||
+      !strcmp(aTopic, kInprocessBrowserShown)) {
+    nsCOMPtr<nsIFrameLoader> frameLoader = do_QueryInterface(aSubject);
+    nsCOMPtr<nsIFrameLoader> myFrameLoader = mBrowserElement->GetFrameLoader();
+    // The browser element API needs the frameloader to
+    // initialize. We still use the observer to get notified when the
+    // frameloader is created. So we check if the frameloader created
+    // is ours, then initialize the browser element API.
+    if (frameLoader && frameLoader == myFrameLoader) {
+      mBrowserElement->InitBrowserElementAPI();
+    }
+  }
+  return NS_OK;
+}
+
+void
+nsBrowserElement::BrowserShownObserver::AddObserver()
+{
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    obs->AddObserver(this, kRemoteBrowserPending, true);
+    obs->AddObserver(this, kInprocessBrowserShown, true);
+  }
+}
+
+void
+nsBrowserElement::BrowserShownObserver::RemoveObserver()
+{
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    obs->RemoveObserver(this, kRemoteBrowserPending);
+    obs->RemoveObserver(this, kInprocessBrowserShown);
+  }
+  mBrowserElement = nullptr;
+}
+
+bool
+nsBrowserElement::IsBrowserElementOrThrow(ErrorResult& aRv)
+{
+  if (mBrowserElementAPI) {
+    return true;
+  }
+  aRv.Throw(NS_ERROR_DOM_INVALID_NODE_TYPE_ERR);
+  return false;
+}
+
+void
+nsBrowserElement::InitBrowserElementAPI()
+{
+  bool isBrowserOrApp;
+  nsCOMPtr<nsIFrameLoader> frameLoader = GetFrameLoader();
+  NS_ENSURE_TRUE_VOID(frameLoader);
+  nsresult rv = frameLoader->GetOwnerIsBrowserOrAppFrame(&isBrowserOrApp);
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  if (!isBrowserOrApp) {
+    return;
+  }
+
+  mBrowserElementAPI = do_CreateInstance("@mozilla.org/dom/browser-element-api;1");
+  if (mBrowserElementAPI) {
+    mBrowserElementAPI->SetFrameLoader(frameLoader);
+  }
+}
+
+nsBrowserElement::nsBrowserElement()
+{
+  mObserver = new BrowserShownObserver(this);
+  mObserver->AddObserver();
+}
+
+nsBrowserElement::~nsBrowserElement()
+{
+  mObserver->RemoveObserver();
+}
+
 void
 nsBrowserElement::SetVisible(bool aVisible, ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SetVisible(aVisible);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
-already_AddRefed<dom::DOMRequest>
+already_AddRefed<DOMRequest>
 nsBrowserElement::GetVisible(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetVisible(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
+  return req.forget().downcast<DOMRequest>();
+}
+
 void
 nsBrowserElement::SetActive(bool aVisible, ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SetActive(aVisible);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 bool
 nsBrowserElement::GetActive(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), false);
+
+  bool isActive;
+  nsresult rv = mBrowserElementAPI->GetActive(&isActive);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return false;
   }
 
+  return isActive;
+}
+
 void
 nsBrowserElement::SendMouseEvent(const nsAString& aType,
                                  uint32_t aX,
@@ -47,122 +209,307 @@ nsBrowserElement::SendMouseEvent(const nsAString& aType,
                                  uint32_t aModifiers,
                                  ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SendMouseEvent(aType,
+                                                   aX,
+                                                   aY,
+                                                   aButton,
+                                                   aClickCount,
+                                                   aModifiers);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 void
 nsBrowserElement::SendTouchEvent(const nsAString& aType,
-                                 const dom::Sequence<uint32_t>& aIdentifiers,
-                                 const dom::Sequence<int32_t>& aXs,
-                                 const dom::Sequence<int32_t>& aYs,
-                                 const dom::Sequence<uint32_t>& aRxs,
-                                 const dom::Sequence<uint32_t>& aRys,
-                                 const dom::Sequence<float>& aRotationAngles,
-                                 const dom::Sequence<float>& aForces,
+                                 const Sequence<uint32_t>& aIdentifiers,
+                                 const Sequence<int32_t>& aXs,
+                                 const Sequence<int32_t>& aYs,
+                                 const Sequence<uint32_t>& aRxs,
+                                 const Sequence<uint32_t>& aRys,
+                                 const Sequence<float>& aRotationAngles,
+                                 const Sequence<float>& aForces,
                                  uint32_t aCount,
                                  uint32_t aModifiers,
                                  ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  if (aIdentifiers.Length() != aCount ||
+      aXs.Length() != aCount ||
+      aYs.Length() != aCount ||
+      aRxs.Length() != aCount ||
+      aRys.Length() != aCount ||
+      aRotationAngles.Length() != aCount ||
+      aForces.Length() != aCount) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    return;
+  }
+
+  nsresult rv = mBrowserElementAPI->SendTouchEvent(aType,
+                                                   aIdentifiers.Elements(),
+                                                   aXs.Elements(),
+                                                   aYs.Elements(),
+                                                   aRxs.Elements(),
+                                                   aRys.Elements(),
+                                                   aRotationAngles.Elements(),
+                                                   aForces.Elements(),
+                                                   aCount,
+                                                   aModifiers);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 void
 nsBrowserElement::GoBack(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->GoBack();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 void
 nsBrowserElement::GoForward(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->GoForward();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 void
 nsBrowserElement::Reload(bool aHardReload, ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Reload(aHardReload);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
 void
 nsBrowserElement::Stop(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Stop();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
-already_AddRefed<dom::DOMRequest>
+already_AddRefed<DOMRequest>
 nsBrowserElement::Download(const nsAString& aUrl,
-                           const dom::BrowserElementDownloadOptions& aOptions,
+                           const BrowserElementDownloadOptions& aOptions,
                            ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  AutoJSAPI jsapi;
+  jsapi.Init();
+  JS::Rooted<JS::Value> options(jsapi.cx());
+  if (!ToJSValue(jsapi.cx(), aOptions, &options)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return nullptr;
+  }
+  nsresult rv = mBrowserElementAPI->Download(aUrl, options, getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
-already_AddRefed<dom::DOMRequest>
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
 nsBrowserElement::PurgeHistory(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->PurgeHistory(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
-already_AddRefed<dom::DOMRequest>
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
 nsBrowserElement::GetScreenshot(uint32_t aWidth,
                                 uint32_t aHeight,
-                                const dom::Optional<nsAString>& aMimeType,
+                                const nsAString& aMimeType,
                                 ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetScreenshot(aWidth, aHeight, aMimeType,
+                                                  getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    if (rv == NS_ERROR_INVALID_ARG) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    } else {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    }
     return nullptr;
   }
 
+  return req.forget().downcast<DOMRequest>();
+}
+
 void
 nsBrowserElement::Zoom(float aZoom, ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+  nsresult rv = mBrowserElementAPI->Zoom(aZoom);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
-already_AddRefed<dom::DOMRequest>
+already_AddRefed<DOMRequest>
 nsBrowserElement::GetCanGoBack(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetCanGoBack(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
-already_AddRefed<dom::DOMRequest>
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
 nsBrowserElement::GetCanGoForward(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetCanGoForward(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
-already_AddRefed<dom::DOMRequest>
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
 nsBrowserElement::GetContentDimensions(ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetContentDimensions(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
-void
-nsBrowserElement::AddNextPaintListener(dom::BrowserElementNextPaintEventCallback& aListener,
-                                       ErrorResult& aRv)
-{
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  return req.forget().downcast<DOMRequest>();
 }
 
 void
-nsBrowserElement::RemoveNextPaintListener(dom::BrowserElementNextPaintEventCallback& aListener,
+nsBrowserElement::AddNextPaintListener(BrowserElementNextPaintEventCallback& aListener,
                                        ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  CallbackObjectHolder<BrowserElementNextPaintEventCallback,
+                       nsIBrowserElementNextPaintListener> holder(&aListener);
+  nsCOMPtr<nsIBrowserElementNextPaintListener> listener = holder.ToXPCOMCallback();
+
+  nsresult rv = mBrowserElementAPI->AddNextPaintListener(listener);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
 }
 
-already_AddRefed<dom::DOMRequest>
+void
+nsBrowserElement::RemoveNextPaintListener(BrowserElementNextPaintEventCallback& aListener,
+                                          ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  CallbackObjectHolder<BrowserElementNextPaintEventCallback,
+                       nsIBrowserElementNextPaintListener> holder(&aListener);
+  nsCOMPtr<nsIBrowserElementNextPaintListener> listener = holder.ToXPCOMCallback();
+
+  nsresult rv = mBrowserElementAPI->RemoveNextPaintListener(listener);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
 nsBrowserElement::SetInputMethodActive(bool aIsActive,
                                        ErrorResult& aRv)
 {
-  aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIFrameLoader> frameLoader = GetFrameLoader();
+  if (!frameLoader) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
     return nullptr;
   }
 
+  nsCOMPtr<nsIDOMElement> ownerElement;
+  nsresult rv = frameLoader->GetOwnerElement(getter_AddRefs(ownerElement));
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+    return nullptr;
+  }
+
+  nsCOMPtr<nsINode> node = do_QueryInterface(ownerElement);
+  nsCOMPtr<nsIPrincipal> principal = node->NodePrincipal();
+  if (!nsContentUtils::IsExactSitePermAllow(principal, "input-manage")) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  rv = mBrowserElementAPI->SetInputMethodActive(aIsActive,
+                                                getter_AddRefs(req));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    if (rv == NS_ERROR_INVALID_ARG) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    } else {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    }
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
 } // namespace mozilla

dom/html/nsBrowserElement.h

@@ -10,6 +10,10 @@
 #include "mozilla/dom/BindingDeclarations.h"
 
 #include "nsCOMPtr.h"
+#include "nsIBrowserElementAPI.h"
+
+class nsFrameLoader;
+class nsIObserver;
 
 namespace mozilla {
 
@@ -27,6 +31,9 @@ class ErrorResult;
 class nsBrowserElement
 {
 public:
+  nsBrowserElement();
+  virtual ~nsBrowserElement();
+
   void SetVisible(bool aVisible, ErrorResult& aRv);
   already_AddRefed<dom::DOMRequest> GetVisible(ErrorResult& aRv);
   void SetActive(bool aActive, ErrorResult& aRv);
@@ -65,7 +72,7 @@ public:
   already_AddRefed<dom::DOMRequest>
   GetScreenshot(uint32_t aWidth,
                 uint32_t aHeight,
-                const dom::Optional<nsAString>& aMimeType,
+                const nsAString& aMimeType,
                 ErrorResult& aRv);
 
   void Zoom(float aZoom, ErrorResult& aRv);
@@ -81,6 +88,18 @@ public:
 
   already_AddRefed<dom::DOMRequest> SetInputMethodActive(bool isActive,
                                                          ErrorResult& aRv);
+
+protected:
+  NS_IMETHOD_(already_AddRefed<nsFrameLoader>) GetFrameLoader() = 0;
+  nsCOMPtr<nsIBrowserElementAPI> mBrowserElementAPI;
+
+private:
+  void InitBrowserElementAPI();
+  bool IsBrowserElementOrThrow(ErrorResult& aRv);
+
+  class BrowserShownObserver;
+  friend class BrowserShownObserver;
+  nsRefPtr<BrowserShownObserver> mObserver;
 };
 
 } // namespace mozilla

dom/html/nsGenericHTMLFrameElement.cpp

@@ -34,6 +34,7 @@ NS_IMPL_CYCLE_COLLECTION_CLASS(nsGenericHTMLFrameElement)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsGenericHTMLFrameElement,
                                                   nsGenericHTMLElement)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFrameLoader)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserElementAPI)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 
 NS_IMPL_ADDREF_INHERITED(nsGenericHTMLFrameElement, nsGenericHTMLElement)

dom/html/nsGenericHTMLFrameElement.h

@@ -34,6 +34,7 @@ public:
                             mozilla::dom::FromParser aFromParser)
     : nsGenericHTMLElement(aNodeInfo)
     , nsElementFrameLoaderOwner(aFromParser)
+    , nsBrowserElement()
   {
   }
 
@@ -73,6 +74,19 @@ public:
 
   static bool BrowserFramesEnabled();
 
+  /**
+   * nsIFrameLoaderOwner defines two GetFrameLoader() overloads. One
+   * is XPCOM style interface, the other one is C++ only.  "using" pulls
+   * them both in, now GetFrameLoader() is ambiguous because
+   * nsBrowserElement also has GetFrameLoader(). Explicit redefine
+   * GetFrameLoader() to choose nsElementFrameLoaderOwner::GetFrameLoader()
+   */
+  using nsElementFrameLoaderOwner::GetFrameLoader;
+  NS_IMETHOD_(already_AddRefed<nsFrameLoader>) GetFrameLoader() MOZ_OVERRIDE
+  {
+    return nsElementFrameLoaderOwner::GetFrameLoader();
+  }
+
   /**
    * Helper method to map a HTML 'scrolling' attribute value to a nsIScrollable
    * enum value.  scrolling="no" (and its synonyms) maps to

dom/webidl/BrowserElement.webidl

@@ -113,7 +113,7 @@ interface BrowserElementPrivileged {
    CheckPermissions="browser"]
   DOMRequest getScreenshot([EnforceRange] unsigned long width,
                            [EnforceRange] unsigned long height,
-                           optional DOMString mimeType);
+                           optional DOMString mimeType="");
 
   [Throws,
    Pref="dom.mozBrowserFramesEnabled",

mobile/android/installer/package-manifest.in

@@ -117,6 +117,7 @@
 @BINPATH@/components/autocomplete.xpt
 @BINPATH@/components/autoconfig.xpt
 @BINPATH@/components/browsercompsbase.xpt
+@BINPATH@/components/browser-element.xpt
 @BINPATH@/components/browser-feeds.xpt
 @BINPATH@/components/caps.xpt
 @BINPATH@/components/chardet.xpt