Move Get/SetScrollOffset methods from WebFrame to WebLocalFrame.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * 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 1278 matching lines @@
   return WebRect();
 }
 
 WebRect WebViewImpl::WidenRectWithinPageBounds(const WebRect& source,
                                                int target_margin,
                                                int minimum_margin) {
   WebSize max_size;
   if (MainFrame())
     max_size = MainFrame()->ContentsSize();
   IntSize scroll_offset;
-  if (MainFrame())
-    scroll_offset = MainFrame()->GetScrollOffset();
+  if (MainFrame() && MainFrame()->IsWebLocalFrame())
+    scroll_offset = MainFrame()->ToWebLocalFrame()->GetScrollOffset();

[dcheng, 2017/06/16 00:03:41]

Ditto.

[Łukasz Anforowicz, 2017/06/16 21:28:13]

Done.

   int left_margin = target_margin;
   int right_margin = target_margin;
 
   const int absolute_source_x = source.x + scroll_offset.Width();
   if (left_margin > absolute_source_x) {
     left_margin = absolute_source_x;
     right_margin = std::max(left_margin, minimum_margin);
   }
 
   const int maximum_right_margin =
@@ skipping 2809 matching lines @@
   if (focused_frame->LocalFrameRoot() != MainFrameImpl()->GetFrame())
     return nullptr;
   return focused_frame;
 }
 
 LocalFrame* WebViewImpl::FocusedLocalFrameAvailableForIme() const {
   return ime_accept_events_ ? FocusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink