Bug 1181916. Notify the debugger's onNewGlobalObject hook off a scriptrunner. r=bholley

dom/base/nsGlobalWindow.cpp

@@ -2709,11 +2709,9 @@ nsGlobalWindow::SetNewDocument(nsIDocument* aDocument,
   // We wait to fire the debugger hook until the window is all set up and hooked
   // up with the outer. See bug 969156.
   if (createdInnerWindow) {
-    // AutoEntryScript required to invoke debugger hook, which is a
-    // Gecko-specific concept at present.
-    AutoEntryScript aes(newInnerWindow, "nsGlobalWindow report new global");
-    JS::Rooted<JSObject*> global(aes.cx(), newInnerWindow->GetWrapper());
-    JS_FireOnNewGlobalObject(aes.cx(), global);
+    nsContentUtils::AddScriptRunner(
+      NS_NewRunnableMethod(newInnerWindow,
+                           &nsGlobalWindow::FireOnNewGlobalObject));
   }
 
   if (newInnerWindow && !newInnerWindow->mHasNotifiedGlobalCreated && mDoc) {
@@ -14167,6 +14165,18 @@ nsGlobalWindow::SetReplaceableWindowCoord(JSContext* aCx,
   (this->*aSetter)(value, aError);
 }
 
+void
+nsGlobalWindow::FireOnNewGlobalObject()
+{
+  MOZ_ASSERT(IsInnerWindow());
+
+  // AutoEntryScript required to invoke debugger hook, which is a
+  // Gecko-specific concept at present.
+  AutoEntryScript aes(this, "nsGlobalWindow report new global");
+  JS::Rooted<JSObject*> global(aes.cx(), GetWrapper());
+  JS_FireOnNewGlobalObject(aes.cx(), global);
+}
+
 #ifdef _WINDOWS_
 #error "Never include windows.h in this file!"
 #endif

dom/base/nsGlobalWindow.h

@@ -1538,6 +1538,11 @@ protected:
   // show, in that case we show a separate dialog to ask this question.
   bool ConfirmDialogIfNeeded();
 
+private:
+  // Fire the JS engine's onNewGlobalObject hook.  Only used on inner windows.
+  void FireOnNewGlobalObject();
+
+protected:
   // When adding new member variables, be careful not to create cycles
   // through JavaScript.  If there is any chance that a member variable
   // could own objects that are implemented in JavaScript, then those