Add layerTreeBuildHelper to control layer tree in ContentViewRenderView

content/public/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_PUBLIC_BROWSER_ANDROID_LAYER_TREE_BUILD_HELPER_H_
+#define CONTENT_PUBLIC_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;
+
+// A Helper class to build a layer tree to be composited
+// given a content root layer.
+class LayerTreeBuildHelper {

[Yaron, 2014/04/23 20:57:46]

http://www.chromium.org/developers/content-module/content-api

Should be an interface with an impl not in public (sorry for not being clear
before)

[Yusuf, 2014/04/24 00:06:03]

Done.

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