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 b7d5d1b193aa43fd55a2511a51976b62d54fac8b..63f699443297e04ee4cd26660c0c1ed328780da3 100644
--- a/cc/trees/proxy_main.h
+++ b/cc/trees/proxy_main.h
@@ -14,6 +14,7 @@
 #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 {
 
@@ -31,6 +32,11 @@ class CC_EXPORT ProxyMain : public Proxy {
       LayerTreeHost* layer_tree_host,
       TaskRunnerProvider* task_runner_provider);
 
+  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