Introduce PlatformBitmap, which is a minimal helper class that wraps an SkBitmap

content/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 #include <map>
 #include <peninputpanel_i.c>
 #include <stack>
@@ skipping 909 matching lines @@
 
 BackingStore* RenderWidgetHostViewWin::AllocBackingStore(
     const gfx::Size& size) {
   return new BackingStoreWin(render_widget_host_, size);
 }
 
 void RenderWidgetHostViewWin::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const base::Callback<void(bool)>& callback,
-    skia::PlatformCanvas* output) {
+    skia::PlatformBitmap* output) {
   base::ScopedClosureRunner scoped_callback_runner(base::Bind(callback, false));
   if (!accelerated_surface_.get())
     return;
 
   if (dst_size.IsEmpty())
     return;
 
-  if (!output->initialize(dst_size.width(), dst_size.height(), true))
+  if (!output->Allocate(dst_size.width(), dst_size.height(), true))
     return;
 
   const bool result = accelerated_surface_->CopyTo(
       src_subrect,
       dst_size,
-      output->getTopDevice()->accessBitmap(true).getPixels());
+      output->GetBitmap().getPixels());
   scoped_callback_runner.Release();
   callback.Run(result);
 }
 
 void RenderWidgetHostViewWin::SetBackground(const SkBitmap& background) {
   RenderWidgetHostViewBase::SetBackground(background);
   render_widget_host_->SetBackground(background);
 }
 
 void RenderWidgetHostViewWin::ProcessTouchAck(
@@ skipping 2175 matching lines @@
   // receive a focus change in the context of a pointer down message, it means
   // that the pointer down message occurred on the edit field and we should
   // display the on screen keyboard
   if (!received_focus_change_after_pointer_down_ && virtual_keyboard_)
     DisplayOnScreenKeyboardIfNeeded();
   received_focus_change_after_pointer_down_ = false;
   pointer_down_context_ = false;
 }
 
 }  // namespace content