Allow message center and related bubbles to render on Windows.

ui/message_center/message_center_bubble.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 "ui/message_center/message_center_bubble.h"
 
 #include "base/command_line.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 220 matching lines @@
         bubble_(bubble) {
     int between_child = UseNewDesign() ? 0 : 1;
     SetLayoutManager(
         new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, between_child));
 
     scroll_content_ = new ScrollContentView;
     scroller_ = new FixedSizedScrollView;
     scroller_->SetContents(scroll_content_);
     AddChildView(scroller_);
 
-    scroller_->SetPaintToLayer(true);
-    scroller_->SetFillsBoundsOpaquely(false);
-    scroller_->layer()->SetMasksToBounds(true);
+    if (get_use_acceleration_when_possible()) {
+      scroller_->SetPaintToLayer(true);
+      scroller_->SetFillsBoundsOpaquely(false);
+      scroller_->layer()->SetMasksToBounds(true);
+    }
 
     button_view_ = new WebNotificationButtonView(list_delegate);
     AddChildView(button_view_);
   }
 
   void FocusContents() {
     scroller_->RequestFocus();
   }
 
   void Update(const NotificationList::Notifications& notifications)  {
@@ skipping 121 matching lines @@
 }
 
 void MessageCenterBubble::OnMouseExitedView() {
 }
 
 size_t MessageCenterBubble::NumMessageViewsForTest() const {
   return contents_view_->NumMessageViews();
 }
 
 }  // namespace message_center