Add implementation of WebWidgetClient::initializeLayerTreeView()

content/renderer/render_widget.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 26 matching lines @@
 struct ViewHostMsg_UpdateRect_Params;
 class ViewHostMsg_UpdateRect;
 
 namespace IPC {
 class SyncMessage;
 }
 
 namespace WebKit {
 class WebGestureEvent;
 class WebInputEvent;
+class WebLayerTreeViewClient;
 class WebMouseEvent;
+class WebTouchEvent;
+struct WebPoint;
 struct WebRenderingStatsImpl;
-struct WebPoint;
-class WebTouchEvent;
 }
 
 namespace cc { class OutputSurface; }
 
 namespace ui {
 class Range;
 }
 
 namespace webkit {
 namespace npapi {
@@ skipping 57 matching lines @@
 
   // WebKit::WebWidgetClient
   virtual void suppressCompositorScheduling(bool enable);
   virtual void willBeginCompositorFrame();
   virtual void didInvalidateRect(const WebKit::WebRect&);
   virtual void didScrollRect(int dx, int dy,
                              const WebKit::WebRect& clipRect);
   virtual void didAutoResize(const WebKit::WebSize& new_size);
   virtual void didActivateCompositor(int input_handler_identifier);
   virtual void didDeactivateCompositor();
+  virtual void initializeLayerTreeView();
   virtual void initializeLayerTreeView(
       WebKit::WebLayerTreeViewClient* client,
       const WebKit::WebLayer& root_layer,
       const WebKit::WebLayerTreeView::Settings& settings);
   virtual WebKit::WebLayerTreeView* layerTreeView();
   virtual void didBecomeReadyForAdditionalInput();
   virtual void didCommitAndDrawCompositorFrame();
   virtual void didCompleteSwapBuffers();
   virtual void scheduleComposite();
   virtual void scheduleAnimation();
@@ skipping 526 matching lines @@
 
   // Specified whether the compositor will run in its own thread.
   bool is_threaded_compositing_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_