cc:: Add remote mode to the compositor

cc/trees/proxy_main.cc

Index: cc/trees/proxy_main.cc
diff --git a/cc/trees/proxy_main.cc b/cc/trees/proxy_main.cc
index 2175e7fb182020dbe9fee68a7cfb5d27fbcd4630..4c3d4a43864ebd01605cd740cf75991b4805e945 100644
--- a/cc/trees/proxy_main.cc
+++ b/cc/trees/proxy_main.cc
@@ -17,6 +17,7 @@
 #include "cc/output/swap_promise.h"
 #include "cc/trees/blocking_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
+#include "cc/trees/remote_channel_main.h"
 #include "cc/trees/scoped_abort_remaining_swap_promises.h"
 #include "cc/trees/threaded_channel.h"
 
@@ -32,6 +33,17 @@ scoped_ptr<ProxyMain> ProxyMain::CreateThreaded(
   return proxy_main;
 }
 
+scoped_ptr<ProxyMain> ProxyMain::CreateRemote(
+    RemoteProtoChannel* remote_proto_channel,
+    LayerTreeHost* layer_tree_host,
+    TaskRunnerProvider* task_runner_provider) {
+  scoped_ptr<ProxyMain> proxy_main(
+      new ProxyMain(layer_tree_host, task_runner_provider));
+  proxy_main->SetChannel(RemoteChannelMain::Create(
+      remote_proto_channel, proxy_main.get(), task_runner_provider));
+  return proxy_main;
+}
+
 ProxyMain::ProxyMain(LayerTreeHost* layer_tree_host,
                      TaskRunnerProvider* task_runner_provider)
     : layer_tree_host_(layer_tree_host),
@@ -378,7 +390,7 @@ void ProxyMain::MainThreadHasStoppedFlinging() {
 void ProxyMain::Start(
     scoped_ptr<BeginFrameSource> external_begin_frame_source) {
   DCHECK(IsMainThread());
-  DCHECK(task_runner_provider_->HasImplThread());
+  DCHECK(layer_tree_host_->IsThreaded() || layer_tree_host_->IsRemoteServer());
   DCHECK(channel_main_);
   DCHECK(!layer_tree_host_->settings().use_external_begin_frame_source ||
          external_begin_frame_source);