Move Get/SetScrollOffset methods from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebFrame.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 122 matching lines @@
   // another process and it dynamically updates these properties.
   // TODO(dcheng): Currently, the update only takes effect on next frame
   // navigation.  This matches the in-process frame behavior.
   void SetFrameOwnerProperties(const WebFrameOwnerProperties&);
 
   // Geometry -----------------------------------------------------------
 
   // NOTE: These routines do not force page layout so their results may
   // not be accurate if the page layout is out-of-date.
 
-  // The scroll offset from the top-left corner of the frame in pixels.
-  virtual WebSize GetScrollOffset() const = 0;
-  virtual void SetScrollOffset(const WebSize&) = 0;
-
   // The size of the contents area.
   virtual WebSize ContentsSize() const = 0;
 
   // Returns true if the contents (minus scrollbars) has non-zero area.
   virtual bool HasVisibleContent() const = 0;
 
   // Returns the visible content rect (minus scrollbars, in absolute coordinate)
   virtual WebRect VisibleContentRect() const = 0;
 
   virtual bool HasHorizontalScrollbar() const = 0;
@@ skipping 155 matching lines @@
   WebFrame* first_child_;
   WebFrame* last_child_;
 
   WebFrame* opener_;
   std::unique_ptr<OpenedFrameTracker> opened_frame_tracker_;
 };
 
 }  // namespace blink
 
 #endif