cc:: Add remote mode to the compositor

cc/trees/layer_tree_host.h

 // Copyright 2011 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 CC_TREES_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 43 matching lines @@
 class AnimationRegistrar;
 class AnimationHost;
 class BeginFrameSource;
 class HeadsUpDisplayLayer;
 class Layer;
 class LayerTreeHostImpl;
 class LayerTreeHostImplClient;
 class LayerTreeHostSingleThreadClient;
 class PropertyTrees;
 class Region;
+class RemoteProtoChannel;
 class RenderingStatsInstrumentation;
 class ResourceProvider;
 class ResourceUpdateQueue;
 class SharedBitmapManager;
 class TaskGraphRunner;
 class TopControlsManager;
 class UIResourceRequest;
 struct PendingPageScaleAnimation;
 struct RenderingStats;
 struct ScrollAndScaleSet;
@@ skipping 16 matching lines @@
   };
 
   // The SharedBitmapManager will be used on the compositor thread.
   static scoped_ptr<LayerTreeHost> CreateThreaded(
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
       InitParams* params);
 
   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();
   void BeginMainFrame(const BeginFrameArgs& args);
   void BeginMainFrameNotExpectedSoon();
   void AnimateLayers(base::TimeTicks monotonic_frame_begin_time);
   void DidStopFlinging();
   void RequestMainFrameUpdate();
   void FinishCommitOnImplThread(LayerTreeHostImpl* host_impl);
   void WillCommit();
@@ skipping 257 matching lines @@
  protected:
   LayerTreeHost(InitParams* params, CompositorMode mode);
   void InitializeThreaded(
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
   void InitializeSingleThreaded(
       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,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
   void SetOutputSurfaceLostForTesting(bool is_lost) {
     output_surface_lost_ = is_lost;
   }
   void SetTaskRunnerProviderForTesting(
       scoped_ptr<TaskRunnerProvider> task_runner_provider);
 
@@ skipping 19 matching lines @@
       scoped_ptr<Proxy> proxy,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
 
   bool DoUpdateLayers(Layer* root_layer);
   void UpdateHudLayer();
 
   bool AnimateLayersRecursive(Layer* current, base::TimeTicks time);
 
   bool IsSingleThreaded() const;
   bool IsThreaded() const;
+  bool IsRemote() const;

[vmpstr, 2016/01/07 19:08:12]

At some point, these function should just become

CompositorMode mode() { return compositor_mode_; }

[Khushal, 2016/01/08 21:17:19]

Updated these functions to IsRemoteServer and IsRemoteClient. The only purpose
of adding them here is for DCHECKs for calls that should be made either on the
server or on the client. Do you think we should avoid doing that?

+  bool IsDeserializable() const;
 
   struct UIResourceClientData {
     UIResourceClient* client;
     gfx::Size size;
   };
 
   typedef base::hash_map<UIResourceId, UIResourceClientData>
       UIResourceClientMap;
   UIResourceClientMap ui_resource_client_map_;
   int next_ui_resource_id_;
@@ skipping 92 matching lines @@
 
   uint32_t surface_id_namespace_;
   uint32_t next_surface_sequence_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_