Use WebViewClient instead of BlinkPlatform for screen lock.

public/platform/Platform.h

 /*
  * Copyright (C) 2012 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 625 matching lines @@
     // Sets a Listener to listen for device orientation data updates.
     // If null, the platform stops providing device orientation data to the current listener.
     virtual void setDeviceOrientationListener(blink::WebDeviceOrientationListener*) { }
 
     // Sets a Listener to listen for device light data updates.
     // If null, the platform stops providing device light data to the current listener.
     virtual void setDeviceLightListener(blink::WebDeviceLightListener*) { }
 
 
     // Screen Orientation -------------------------------------------------
+    // FIXME: this is meant to be removed when the content layer will be updated.
 
-    virtual void setScreenOrientationListener(blink::WebScreenOrientationListener*) { }
     virtual void lockOrientation(WebScreenOrientationLockType) { }
     // Request a screen orientation lock and pass a |callback| object to be used
     // to notify of success/failure. The |callback| parameter is expected to be
     // owned by the implementation.
     virtual void lockOrientation(WebScreenOrientationLockType orientation, WebLockOrientationCallback* callback)
     {
         // FIXME: remove this when
         // lockOrientation(orientation, callback) will be handled in Chromium.
         lockOrientation(orientation);
 
@@ skipping 20 matching lines @@
     virtual WebDatabaseObserver* databaseObserver() { return 0; }
 
 
 protected:
     virtual ~Platform() { }
 };
 
 } // namespace blink
 
 #endif