Allow CanvasSkia to bind to an existing SkCanvas.

views/widget/root_view.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/widget/root_view.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 400 matching lines @@
       mouse_pressed_handler_ = NULL;
     if (mouse_move_handler_ == child)
       mouse_move_handler_ = NULL;
     if (touch_pressed_handler_ == child)
       touch_pressed_handler_ = NULL;
   }
 }
 
 void RootView::OnPaint(gfx::Canvas* canvas) {
 #if !defined(TOUCH_UI)
-  canvas->AsCanvasSkia()->drawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
+  canvas->GetSkCanvas()->drawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
 #endif
 }
 
 void RootView::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
                                                   ui::Layer** layer_parent) {
   View::CalculateOffsetToAncestorWithLayer(offset, layer_parent);
   if (!layer())
     widget_->CalculateOffsetToAncestorWithLayer(offset, layer_parent);
 }
 
@@ skipping 10 matching lines @@
 }
 
 void RootView::SetMouseLocationAndFlags(const MouseEvent& event) {
   last_mouse_event_flags_ = event.flags();
   last_mouse_event_x_ = event.x();
   last_mouse_event_y_ = event.y();
 }
 
 }  // namespace internal
 }  // namespace views