cc: Clean up LayerTreeTest and TestHooks.

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index aafcd8dcd458f446b06646b9babb914ab158370e..12e0cfff971aac46f37c661d52e777d8ab60d6a6 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -18,6 +18,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_math.h"
 #include "base/single_thread_task_runner.h"
@@ -322,8 +323,8 @@ void LayerTreeHost::InitializeRemoteClient(
   // LayerTreeHost on the client, while the other requests are sent to the
   // RemoteChannelMain on the server which directs them to ProxyMain and the
   // remote server LayerTreeHost.
-  InitializeProxy(RemoteChannelImpl::Create(this, remote_proto_channel,
-                                            task_runner_provider_.get()),
+  InitializeProxy(base::MakeUnique<RemoteChannelImpl>(
+                      this, remote_proto_channel, task_runner_provider_.get()),
                   nullptr);
 }