Remove defunct WebFrameClient::initializeChildFrame method.

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 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 551 matching lines @@
     // This call is placed here instead of WebContentSettingsClient because this
     // class is implemented in content/, and putting it here avoids adding
     // more public content/ APIs.
     virtual bool allowWebGL(WebLocalFrame*, bool defaultValue) { return defaultValue; }
 
     // Notifies the client that a WebGL context was lost on this page with the
     // given reason (one of the GL_ARB_robustness status codes; see
     // Extensions3D.h in WebCore/platform/graphics).
     virtual void didLoseWebGLContext(WebLocalFrame*, int) { }
 
-    // Send initial drawing parameters to a child frame that is being rendered out of process.
-    virtual void initializeChildFrame(const WebRect& frameRect, float scaleFactor) { }
-
 
     // Screen Orientation --------------------------------------------------
 
     // Access the embedder API for (client-based) screen orientation client .
     virtual WebScreenOrientationClient* webScreenOrientationClient() { return 0; }
 
 
     // Accessibility -------------------------------------------------------
 
     // Notifies embedder about an accessibility event.
@@ skipping 80 matching lines @@
     // WebUSB --------------------------------------------------------------
     virtual WebUSBClient* usbClient() { return nullptr; }
 
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif