Move Get/SetScrollOffset methods from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebFrame.h

Index: third_party/WebKit/public/web/WebFrame.h
diff --git a/third_party/WebKit/public/web/WebFrame.h b/third_party/WebKit/public/web/WebFrame.h
index 3db02d3e5eb6e3f7248815a867a22ed238051ab2..768a44f32d8a4f493623435aa776c6be0e80c465 100644
--- a/third_party/WebKit/public/web/WebFrame.h
+++ b/third_party/WebKit/public/web/WebFrame.h
@@ -140,10 +140,6 @@ class BLINK_EXPORT WebFrame {
   // 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   // not be accurate if the page layout is out-of-date.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;