binding: Calls didAccessInitialDocument() for a returned Window.

third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp

 /*
  * Copyright (C) 2009, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 226 matching lines @@
         frameName = frameNameResource;
     }
     TOSTRING_VOID(V8StringResource<TreatNullAndUndefinedAsNullString>, windowFeaturesString, info[2]);
 
     // |impl| has to be a LocalDOMWindow, since RemoteDOMWindows wouldn't have
     // passed the BindingSecurity check above.
     DOMWindow* openedWindow = toLocalDOMWindow(impl)->open(urlString, frameName, windowFeaturesString, currentDOMWindow(info.GetIsolate()), enteredDOMWindow(info.GetIsolate()));
     if (!openedWindow)
         return;
 
+    if (openedWindow->isLocalDOMWindow()) {
+        LocalFrame* targetFrame = toLocalDOMWindow(openedWindow)->frame();
+        if (targetFrame) {
+            // Notify the loader's client if the initial document has been accessed.
+            if (targetFrame->loader().stateMachine()->isDisplayingInitialEmptyDocument()) {
+                targetFrame->loader().didAccessInitialDocument();
+            }
+        }
+    }
+
     v8SetReturnValueFast(info, openedWindow, impl);
 }
 
 void V8Window::namedPropertyGetterCustom(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     auto nameString = name.As<v8::String>();
     DOMWindow* window = V8Window::toImpl(info.Holder());
     if (!window)
         return;
 
@@ skipping 45 matching lines @@
         if (items->hasExactlyOneItem()) {
             v8SetReturnValueFast(info, items->item(0), window);
             return;
         }
         v8SetReturnValueFast(info, items, window);
         return;
     }
 }
 
 } // namespace blink