Add layerTreeBuildHelper to control layer tree in ContentViewRenderView

content/browser/android/layer_tree_build_helper.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_ANDROID_LAYER_TREE_BUILD_HELPER_H_
+#define CONTENT_BROWSER_ANDROID_LAYER_TREE_BUILD_HELPER_H_
+
+#include "base/memory/ref_counted.h"
+
+namespace cc {
+class Layer;
+class SolidColorLayer;
+}
+
+namespace content {
+class Compositor;
+class ContentViewCoreImpl;
+
+class LayerTreeBuildHelper {

[Yaron, 2014/04/10 01:26:09]

Needs comment.

[Yusuf, 2014/04/23 00:16:14]

Done.

+ public:
+
+  LayerTreeBuildHelper();
+
+  virtual ~LayerTreeBuildHelper();
+
+  virtual cc::Layer* GetLayerTree(ContentViewCoreImpl* content_view);
+
+ protected:
+  scoped_refptr<cc::Layer> root_layer_;
+
+  DISALLOW_COPY_AND_ASSIGN(LayerTreeBuildHelper);
+};
+
+}
+
+#endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_RENDER_VIEW_H_