Move didChangeSelection to WebFrameClient.

public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 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 144 matching lines @@
     // Notification that some progress was made loading the current page.
     // loadProgress is a value between 0 (nothing loaded) and 1.0 (frame fully
     // loaded).
     virtual void didChangeLoadProgress(WebFrame*, double loadProgress) { }
 
     // Editing -------------------------------------------------------------
 
     // These methods allow the client to intercept and overrule editing
     // operations.
     virtual void didCancelCompositionOnSelectionChange() { }
-    virtual void didChangeSelection(bool isSelectionEmpty) { }
     virtual void didChangeContents() { }
     virtual void didExecuteCommand(const WebString& commandName) { }
 
     // This method is called in response to WebView's handleInputEvent()
     // when the default action for the current keyboard event is not
     // suppressed by the page, to give the embedder a chance to handle
     // the keyboard event specially.
     //
     // Returns true if the keyboard event was handled by the embedder,
     // indicating that the default action should be suppressed.
@@ skipping 233 matching lines @@
     // Informs the browser that the draggable regions have been updated.
     virtual void draggableRegionsChanged() { }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif