cc:: Add remote mode to the compositor

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 2dc93ee2bffcb5a45843584253e0d5e988298253..3831cd212b14405651410d4ec586c29d2c26c01e 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -58,6 +58,7 @@ class LayerTreeHostImplClient;
 class LayerTreeHostSingleThreadClient;
 class PropertyTrees;
 class Region;
+class RemoteProtoChannel;
 class RenderingStatsInstrumentation;
 class ResourceProvider;
 class ResourceUpdateQueue;
@@ -94,8 +95,23 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   static scoped_ptr<LayerTreeHost> CreateSingleThreaded(
       LayerTreeHostSingleThreadClient* single_thread_client,
       InitParams* params);
+
+  static scoped_ptr<LayerTreeHost> CreateRemote(
+      RemoteProtoChannel* remote_proto_channel,
+      InitParams* params);
+
+  static scoped_ptr<LayerTreeHost> CreateDeserializable(
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
+      InitParams* params);
+
   virtual ~LayerTreeHost();
 
+  // Should be called only for the remote mode.
+  void ToProtobuf();
+
+  // Should be called only for the deserializable mode.
+  void FromProtobuf();
+
   // LayerTreeHost interface to Proxy.
   void WillBeginMainFrame();
   void DidBeginMainFrame();
@@ -373,6 +389,12 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
       LayerTreeHostSingleThreadClient* single_thread_client,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
+  void InitializeRemote(
+      RemoteProtoChannel* remote_proto_channel,
+      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner);
+  void InitializeDeserializable(
+      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
   void InitializeForTesting(scoped_ptr<TaskRunnerProvider> task_runner_provider,
                             scoped_ptr<Proxy> proxy_for_testing);
   void SetOutputSurfaceLostForTesting(bool is_lost) {
@@ -408,6 +430,8 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
 
   bool IsSingleThreaded() const;
   bool IsThreaded() const;
+  bool IsRemote() const;
+  bool IsDeserializable() const;
 
   struct UIResourceClientData {
     UIResourceClient* client;