Add GrabWindowSnapshotAsync tests

chrome/browser/media/desktop_media_list_ash.cc

 // Copyright 2013 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/media/desktop_media_list_ash.h"
 
 #include <map>
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 163 matching lines @@
   }
 }
 
 void DesktopMediaListAsh::CaptureThumbnail(content::DesktopMediaID id,
                                            aura::Window* window) {
   gfx::Rect window_rect(window->bounds().width(), window->bounds().height());
   gfx::Rect scaled_rect = media::ComputeLetterboxRegion(
       gfx::Rect(thumbnail_size_), window_rect.size());
 
   ++pending_window_capture_requests_;
-  ui::GrabWindowSnapshotAsync(
+  ui::GrabWindowSnapshotAndScaleAsync(
       window, window_rect,
       scaled_rect.size(),
       BrowserThread::GetBlockingPool(),
       base::Bind(&DesktopMediaListAsh::OnThumbnailCaptured,
                  weak_factory_.GetWeakPtr(),
                  id));
 }
 
 void DesktopMediaListAsh::OnThumbnailCaptured(content::DesktopMediaID id,
                                               const gfx::Image& image) {
@@ skipping 11 matching lines @@
   if (!pending_window_capture_requests_) {
     // Once we've finished capturing all windows post a task for the next list
     // update.
     BrowserThread::PostDelayedTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&DesktopMediaListAsh::Refresh,
                    weak_factory_.GetWeakPtr()),
         update_period_);
   }
 }