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

ui/compositor/paint_recorder.cc

Index: ui/compositor/paint_recorder.cc
diff --git a/ui/compositor/paint_recorder.cc b/ui/compositor/paint_recorder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..538db4b9bbd69c884d713558edab37cadac54022
--- /dev/null
+++ b/ui/compositor/paint_recorder.cc
@@ -0,0 +1,18 @@
+// Copyright 2015 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/compositor/paint_recorder.h"
+
+#include "ui/compositor/paint_context.h"
+
+namespace ui {
+
+PaintRecorder::PaintRecorder(const PaintContext& context)
+    : canvas_(context.canvas()) {
+}
+
+PaintRecorder::~PaintRecorder() {
+}
+
+}  // namespace ui