Extract a DOMWindow interface from LocalDOMWindow and use it in the idl.

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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 650 matching lines @@
     EXPECT_EQ(std::string::npos, content.find("Message 2."));
 }
 
 TEST_F(WebFrameTest, PostMessageThenDetach)
 {
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad("about:blank");
 
     RefPtrWillBeRawPtr<LocalFrame> frame = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame());
     NonThrowableExceptionState exceptionState;
-    frame->domWindow()->postMessage(SerializedScriptValue::create("message"), 0, "*", frame->domWindow(), exceptionState);
+    frame->domWindow()->postMessage(SerializedScriptValue::create("message"), 0, "*", frame->localDOMWindow(), exceptionState);
     webViewHelper.reset();
     EXPECT_FALSE(exceptionState.hadException());
 
     // Success is not crashing.
     runPendingTasks();
 }
 
 class FixedLayoutTestWebViewClient : public FrameTestHelpers::TestWebViewClient {
  public:
     virtual WebScreenInfo screenInfo() override { return m_screenInfo; }
@@ skipping 6200 matching lines @@
     EXPECT_EQ(1u, frameClient.navigationalDataReceivedCount());
 
     // Neither should a page reload.
     localFrame->reload();
     EXPECT_EQ(4u, frameClient.provisionalLoadCount());
     EXPECT_FALSE(frameClient.wasLastProvisionalLoadATransition());
     EXPECT_EQ(1u, frameClient.navigationalDataReceivedCount());
 }
 
 } // namespace