cc:: Add remote mode to the compositor

cc/trees/proxy_main.h

Index: cc/trees/proxy_main.h
diff --git a/cc/trees/proxy_main.h b/cc/trees/proxy_main.h
index edc2a224ab3d76dceaf75a2a07ebed9db07d359b..4ce5ca90d203d03ee6e28be916fd0eaa9185d57f 100644
--- a/cc/trees/proxy_main.h
+++ b/cc/trees/proxy_main.h
@@ -15,6 +15,7 @@
 #include "cc/trees/channel_main.h"
 #include "cc/trees/proxy.h"
 #include "cc/trees/proxy_common.h"
+#include "cc/trees/remote_proto_channel.h"
 
 namespace cc {
 class BeginFrameSource;
@@ -31,6 +32,11 @@ class CC_EXPORT ProxyMain : public Proxy {
       TaskRunnerProvider* task_runner_provider,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
 
+  static scoped_ptr<ProxyMain> CreateRemote(
+      RemoteProtoChannel* remote_proto_channel,
+      LayerTreeHost* layer_tree_host,
+      TaskRunnerProvider* task_runner_provider);
+
   ~ProxyMain() override;
 
   // Commits between the main and impl threads are processed through a pipeline