cc: Delete channel abstraction between proxies.

cc/trees/layer_tree_host_in_process.cc

Index: cc/trees/layer_tree_host_in_process.cc
diff --git a/cc/trees/layer_tree_host_in_process.cc b/cc/trees/layer_tree_host_in_process.cc
index 6280097b16a1119d8b7007ba80fbb41d98b096e3..8a9d969f3a6e84dd2ccfa29311a4a836ea8cfa63 100644
--- a/cc/trees/layer_tree_host_in_process.cc
+++ b/cc/trees/layer_tree_host_in_process.cc
@@ -134,7 +134,7 @@ void LayerTreeHostInProcess::InitializeThreaded(
   task_runner_provider_ =
       TaskRunnerProvider::Create(main_task_runner, impl_task_runner);
   std::unique_ptr<ProxyMain> proxy_main =
-      ProxyMain::CreateThreaded(this, task_runner_provider_.get());
+      base::MakeUnique<ProxyMain>(this, task_runner_provider_.get());
   InitializeProxy(std::move(proxy_main));
 }