Allow message center and related bubbles to render on Windows.

ui/views/bubble/tray_bubble_view.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/views/bubble/tray_bubble_view.h"
 
 #include <algorithm>
 
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 257 matching lines @@
     : views::BubbleDelegateView(anchor, init_params.arrow_location),
       params_(init_params),
       delegate_(delegate),
       preferred_width_(init_params.min_width),
       bubble_border_(NULL),
       is_gesture_dragging_(false) {
   set_parent_window(parent_window);
   set_notify_enter_exit_on_child(true);
   set_close_on_deactivate(init_params.close_on_deactivate);
   set_margins(gfx::Insets());
-  SetPaintToLayer(true);
-  SetFillsBoundsOpaquely(true);
+  bubble_border_ = new TrayBubbleBorder(this, anchor_view(), params_);
+  if (get_use_acceleration_when_possible()) {
+    SetPaintToLayer(true);
+    SetFillsBoundsOpaquely(true);
 
-  bubble_border_ = new TrayBubbleBorder(this, anchor_view(), params_);
-
-  bubble_content_mask_.reset(
-      new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius() - 1));
+    bubble_content_mask_.reset(
+        new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius() - 1));
+  }
 }
 
 TrayBubbleView::~TrayBubbleView() {
   // Inform host items (models) that their views are being destroyed.
   if (delegate_)
     delegate_->BubbleViewDestroyed();
 }
 
 void TrayBubbleView::InitializeAndShowBubble() {
   // Must occur after call to BubbleDelegateView::CreateBubble().
   SetAlignment(views::BubbleBorder::ALIGN_EDGE_TO_ANCHOR_EDGE);
   bubble_border_->UpdateArrowOffset();
 
-  layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
+  if (get_use_acceleration_when_possible())
+    layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
 
   Show();
   UpdateBubble();
 }
 
 void TrayBubbleView::UpdateBubble() {
   SizeToContents();
-  bubble_content_mask_->layer()->SetBounds(layer()->bounds());
+  if (get_use_acceleration_when_possible())
+    bubble_content_mask_->layer()->SetBounds(layer()->bounds());
   GetWidget()->GetRootView()->SchedulePaint();
 }
 
 void TrayBubbleView::SetMaxHeight(int height) {
   params_.max_height = height;
   if (GetWidget())
     SizeToContents();
 }
 
 void TrayBubbleView::SetWidth(int width) {
@@ skipping 79 matching lines @@
   }
 }
 
 void TrayBubbleView::ChildPreferredSizeChanged(View* child) {
   SizeToContents();
 }
 
 void TrayBubbleView::ViewHierarchyChanged(bool is_add,
                                           views::View* parent,
                                           views::View* child) {
-  if (is_add && child == this) {
+  if (get_use_acceleration_when_possible() && is_add && child == this) {
     parent->SetPaintToLayer(true);
     parent->SetFillsBoundsOpaquely(true);
     parent->layer()->SetMasksToBounds(true);
   }
 }
 
 }  // namespace views