Make scoped dc objects smarter.

chrome/browser/aeropeek_manager.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 "chrome/browser/aeropeek_manager.h"
 
 #include <dwmapi.h>
 #include <shobjidl.h>
 
 #include "base/command_line.h"
@@ skipping 204 matching lines @@
     LOG(ERROR) << "cannot create a memory DC: " << GetLastError();
     return;
   }
 
   BITMAPINFOHEADER header;
   gfx::CreateBitmapHeader(thumbnail_size.width(), thumbnail_size.height(),
                           &header);
 
   void* bitmap_data = NULL;
   base::win::ScopedBitmap bitmap(
-      CreateDIBSection(hdc, reinterpret_cast<BITMAPINFO*>(&header),
+      CreateDIBSection(hdc.Get(), reinterpret_cast<BITMAPINFO*>(&header),
                        DIB_RGB_COLORS, &bitmap_data, NULL, 0));
 
   if (!bitmap.Get() || !bitmap_data) {
     LOG(ERROR) << "cannot create a bitmap: " << GetLastError();
     return;
   }
 
   SkAutoLockPixels lock(thumbnail_bitmap);
   int* content_pixels = reinterpret_cast<int*>(bitmap_data);
   for (int y = 0; y < thumbnail_size.height(); ++y) {
@@ skipping 768 matching lines @@
   // This code is just copied from "thumbnail_generator.cc".
   skia::PlatformCanvas canvas;
   if (!backing_store->CopyFromBackingStore(gfx::Rect(backing_store->size()),
                                            &canvas))
     return false;
 
   const SkBitmap& bitmap = skia::GetTopDevice(canvas)->accessBitmap(false);
   bitmap.copyTo(preview, SkBitmap::kARGB_8888_Config);
   return true;
 }