Pass a ui::PaintContext from ui::Layer to layer delegates.

content/browser/web_contents/web_contents_view_aura.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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/metrics/histogram.h"
@@ skipping 1459 matching lines @@
       web_contents_->GetRenderWidgetHostView());
   if (view != NULL && !view->IsClosing())
     return true;
 
   return false;
 }
 
 void WebContentsViewAura::OnCaptureLost() {
 }
 
-void WebContentsViewAura::OnPaint(gfx::Canvas* canvas) {
+void WebContentsViewAura::OnPaint(const ui::PaintContext& context) {
 }
 
 void WebContentsViewAura::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
 }
 
 void WebContentsViewAura::OnWindowDestroying(aura::Window* window) {
   // This means the destructor is going to be called soon. If there is an
   // overscroll gesture in progress (i.e. |overscroll_window_| is not NULL),
   // then destroying it in the WebContentsViewAura destructor can trigger other
@@ skipping 155 matching lines @@
   if (visible) {
     if (!web_contents_->should_normally_be_visible())
       web_contents_->WasShown();
   } else {
     if (web_contents_->should_normally_be_visible())
       web_contents_->WasHidden();
   }
 }
 
 }  // namespace content