Add PlatformLocalFrame class.

third_party/WebKit/Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 1842 matching lines @@
             ? visual_viewport.VisibleRect().MaxX() - kContextMenuMargin
             : visual_viewport.GetScrollOffset().Width() + kContextMenuMargin,
         visual_viewport.GetScrollOffset().Height() + kContextMenuMargin);
   }
 
   frame_->View()->SetCursor(PointerCursor());
   IntPoint location_in_viewport =
       visual_viewport.RootFrameToViewport(location_in_root_frame);
   IntPoint global_position =
       view->GetChromeClient()
-          ->ViewportToScreen(IntRect(location_in_viewport, IntSize()),
-                             frame_->View())
+          ->ViewportToScreen(IntRect(location_in_viewport, IntSize()), frame_)
           .Location();
 
   Node* target_node =
       override_target_element ? override_target_element : doc->FocusedElement();
   if (!target_node)
     target_node = doc;
 
   // Use the focused node as the target for hover and active.
   HitTestRequest request(HitTestRequest::kActive);
   HitTestResult result(request, location_in_root_frame);
@@ skipping 242 matching lines @@
     MouseEventWithHitTestResults& mev,
     LocalFrame* subframe) {
   WebInputEventResult result =
       subframe->GetEventHandler().HandleMouseReleaseEvent(mev.Event());
   if (result != WebInputEventResult::kNotHandled)
     return result;
   return WebInputEventResult::kHandledSystem;
 }
 
 }  // namespace blink