Make View::Paint use ui::PaintRecorder to access PaintContext's canvas

ui/message_center/views/message_center_view.cc

 // Copyright (c) 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 "ui/message_center/views/message_center_view.h"
 
 #include <list>
 #include <map>
 
 #include "base/command_line.h"
@@ skipping 113 matching lines @@
   void UpdateNotification(MessageView* view, const Notification& notification);
   void SetRepositionTarget(const gfx::Rect& target_rect);
   void ResetRepositionSession();
   void ClearAllNotifications(const gfx::Rect& visible_scroll_rect);
 
  protected:
   // Overridden from views::View.
   void Layout() override;
   gfx::Size GetPreferredSize() const override;
   int GetHeightForWidth(int width) const override;
-  void PaintChildren(const PaintContext& context) override;
+  void PaintChildren(const ui::PaintContext& context) override;
   void ReorderChildLayers(ui::Layer* parent_layer) override;
 
   // Overridden from views::BoundsAnimatorObserver.
   void OnBoundsAnimatorProgressed(views::BoundsAnimator* animator) override;
   void OnBoundsAnimatorDone(views::BoundsAnimator* animator) override;
 
  private:
   bool IsValidChild(const views::View* child) const;
   void DoUpdateIfPossible();
 
@@ skipping 160 matching lines @@
     const views::View* child = child_at(i);
     if (!IsValidChild(child))
       continue;
     height += child->GetHeightForWidth(width) + padding;
     padding = kMarginBetweenItems - MessageView::GetShadowInsets().bottom();
   }
 
   return height + GetInsets().height();
 }
 
-void MessageListView::PaintChildren(const PaintContext& context) {
+void MessageListView::PaintChildren(const ui::PaintContext& context) {
   // Paint in the inversed order. Otherwise upper notification may be
   // hidden by the lower one.
   for (int i = child_count() - 1; i >= 0; --i) {
     if (!child_at(i)->layer())
       child_at(i)->Paint(context);
   }
 }
 
 void MessageListView::ReorderChildLayers(ui::Layer* parent_layer) {
   // Reorder children to stack the last child layer at the top. Otherwise
@@ skipping 680 matching lines @@
   scroller_->InvalidateLayout();
   PreferredSizeChanged();
   Layout();
 }
 
 void MessageCenterView::SetNotificationViewForTest(MessageView* view) {
   message_list_view_->AddNotificationAt(view, 0);
 }
 
 }  // namespace message_center