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 bb510b8569a1cf4550f4119112ec11e88a8441b1..79abcdf5a704185a082e938e0ecf0ea3f6060765 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;
@@ -30,6 +31,11 @@ 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