Introduce InspectorFrontendHost.sendMessageToFrontendHost.

Source/core/testing/InspectorFrontendClientLocal.h

 /*
  * 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 51 matching lines @@
 
     virtual void bringToFront() OVERRIDE { }
     virtual void closeWindow() OVERRIDE { }
 
     virtual void attachWindow(DockSide) { }
     virtual void detachWindow() { }
 
     virtual void inspectedURLChanged(const String&) OVERRIDE { }
 
     virtual void sendMessageToBackend(const String& message);
+    virtual void sendMessageToFrontendHost(const String&) OVERRIDE { }
 
     virtual void requestFileSystems() { }
     virtual void addFileSystem() { }
     virtual void removeFileSystem(const String&) { }
     virtual void indexPath(int requestId, const String& fileSystemPath) { }
     virtual void stopIndexing(int requestId) { }
     virtual void searchInPath(int requestId, const String& fileSystemPath, const String& query) { }
 
     virtual bool isUnderTest() { return true; }
 
 private:
     Page* m_frontendPage;
     // TODO(yurys): this ref shouldn't be needed.
     RefPtr<InspectorFrontendHost> m_frontendHost;
     RefPtr<InspectorBackendMessageQueue> m_messageQueue;
 };
 
 } // namespace WebCore
 
 #endif