rename getBitmapDC to beginPlatformPaint and add calls to endPlatformPaint

skia/ext/platform_canvas_win.cc

Index: skia/ext/platform_canvas_win.cc
diff --git a/skia/ext/platform_canvas_win.cc b/skia/ext/platform_canvas_win.cc
index e761ceea5bebf82a94a094dbd3a5a3f3dfa78098..8d1a65a4356aac362a2bf40540c05c5c6d909341 100644
--- a/skia/ext/platform_canvas_win.cc
+++ b/skia/ext/platform_canvas_win.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -106,13 +106,14 @@ bool PlatformCanvas::initialize(int width,
       width, height, is_opaque, shared_section));
 }
 
-HDC PlatformCanvas::beginPlatformPaint() {
-  return getTopPlatformDevice().getBitmapDC();
+HDC PlatformCanvas::beginPlatformPaint() const {
+  return getTopPlatformDevice().beginPlatformPaint();
 }
 
-void PlatformCanvas::endPlatformPaint() {
+void PlatformCanvas::endPlatformPaint() const {
   // we don't clear the DC here since it will be likely to be used again
   // flushing will be done in onAccessBitmap
+  return getTopPlatformDevice().endPlatformPaint();
 }
 
 }  // namespace skia