binding: Calls didAccessInitialDocument() for a returned Window.

third_party/WebKit/Source/core/frame/DOMWindow.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/DOMWindow.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
@@ skipping 112 matching lines @@
 {
     DEFINE_STATIC_LOCAL(Persistent<External>, external, (new External));
     return external;
 }
 
 DOMWindow* DOMWindow::anonymousIndexedGetter(uint32_t index) const
 {
     if (!frame())
         return nullptr;
 
-    Frame* child = frame()->tree().scopedChild(index);
-    return child ? child->domWindow() : nullptr;
+    Frame* childFrame = frame()->tree().scopedChild(index);
+    if (!childFrame)
+        return nullptr;
+
+    DOMWindow* childWindow = childFrame->domWindow();
+    if (childWindow && childWindow->isLocalDOMWindow()) {
+        LocalFrame* targetFrame = blink::toLocalDOMWindow(childWindow)->frame();
+        if (targetFrame) {
+            // Notify the loader's client if the initial document has been accessed.
+            if (targetFrame->loader().stateMachine()->isDisplayingInitialEmptyDocument()) {
+                targetFrame->loader().didAccessInitialDocument();
+            }
+        }
+    }
+
+    return childWindow;
 }
 
 bool DOMWindow::isCurrentlyDisplayedInFrame() const
 {
     if (frame())
         SECURITY_CHECK(frame()->domWindow() == this);
     return frame() && frame()->host();
 }
 
 bool DOMWindow::isInsecureScriptAccess(LocalDOMWindow& callingWindow, const String& urlString)
@@ skipping 230 matching lines @@
     page->focusController().focusDocumentView(frame(), true /* notifyEmbedder */);
 }
 
 DEFINE_TRACE(DOMWindow)
 {
     visitor->trace(m_location);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink