Add PlatformLocalFrame class.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 4516 matching lines @@
   IntPoint point_in_frame = ContentsToFrame(point_in_contents);
   IntPoint point_in_root_frame = ConvertToRootFrame(point_in_frame);
   return frame_->GetPage()->GetVisualViewport().RootFrameToViewport(
       point_in_root_frame);
 }
 
 IntRect FrameView::ContentsToScreen(const IntRect& rect) const {
   PlatformChromeClient* client = GetChromeClient();
   if (!client)
     return IntRect();
-  return client->ViewportToScreen(ContentsToViewport(rect), this);
+  return client->ViewportToScreen(ContentsToViewport(rect), frame_);
 }
 
 IntPoint FrameView::SoonToBeRemovedUnscaledViewportToContents(
     const IntPoint& point_in_viewport) const {
   IntPoint point_in_root_frame = FlooredIntPoint(
       frame_->GetPage()->GetVisualViewport().ViewportCSSPixelsToRootFrame(
           point_in_viewport));
   IntPoint point_in_this_frame = ConvertFromRootFrame(point_in_root_frame);
   return FrameToContents(point_in_this_frame);
 }
@@ skipping 840 matching lines @@
 void FrameView::SetAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   animation_host_ = std::move(host);
 }
 
 LayoutUnit FrameView::CaretWidth() const {
   return LayoutUnit(GetChromeClient()->WindowToViewportScalar(1));
 }
 
 }  // namespace blink