ui: Use a PaintRecorder to access the Canvas for painting.

ui/views/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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1441 matching lines @@
   } else {
     for (int i = 0, count = child_count(); i < count; ++i) {
       View* child = child_at(i);
       child->UpdateChildLayerBounds(
           offset + gfx::Vector2d(child->GetMirroredX(), child->y()));
     }
   }
 }
 
 void View::OnPaintLayer(const ui::PaintContext& context) {
-  if (!layer()->fills_bounds_opaquely())
-    context.canvas()->DrawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
+  if (!layer()->fills_bounds_opaquely()) {
+    ui::PaintRecorder recorder(context);
+    recorder.canvas()->DrawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
+  }
   if (!visible_)
     return;
   Paint(context);
 }
 
 void View::OnDelegatedFrameDamage(
     const gfx::Rect& damage_rect_in_dip) {
 }
 
 void View::OnDeviceScaleFactorChanged(float device_scale_factor) {
@@ skipping 893 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views