Revert of Move compositor InputHandler from RenderViewImpl to RenderWidget.

third_party/WebKit/Source/web/tests/FrameTestHelpers.h

 /*
  * Copyright (C) 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 123 matching lines @@
 
  private:
   bool m_originalMockScrollbarEnabled;
   bool m_originalOverlayScrollbarsEnabled;
 };
 
 class TestWebWidgetClient : public WebWidgetClient {
  public:
   virtual ~TestWebWidgetClient() {}
   bool allowsBrokenNullLayerTreeView() const override { return true; }
-  WebLayerTreeView* initializeLayerTreeView() override;
-
- private:
-  std::unique_ptr<WebLayerTreeView> m_layerTreeView;
 };
 
 class TestWebViewWidgetClient : public TestWebWidgetClient {
  public:
   explicit TestWebViewWidgetClient(TestWebViewClient* testWebViewClient)
       : m_testWebViewClient(testWebViewClient) {}
   virtual ~TestWebViewWidgetClient() {}
 
   WebLayerTreeView* initializeLayerTreeView() override;
   void scheduleAnimation() override;
@@ skipping 116 matching lines @@
                           WebDOMMessageEvent) override {}
 
  private:
   Persistent<WebRemoteFrameImpl> const m_frame;
 };
 
 }  // namespace FrameTestHelpers
 }  // namespace blink
 
 #endif  // FrameTestHelpers_h