cc: Remove client/engine LayerTreeHostInProcess.

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 00b64e162addf1054dd194e07c0f3976cdcaf800..b3dd3e417d3f7caa2025e8ff2209da2a2006170e 100644
--- a/cc/trees/proxy_main.h
+++ b/cc/trees/proxy_main.h
@@ -11,7 +11,6 @@
 #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 {
 
@@ -31,11 +30,6 @@ class CC_EXPORT ProxyMain : public Proxy {
       LayerTreeHostInProcess* layer_tree_host,
       TaskRunnerProvider* task_runner_provider);
 
-  static std::unique_ptr<ProxyMain> CreateRemote(
-      RemoteProtoChannel* remote_proto_channel,
-      LayerTreeHostInProcess* layer_tree_host,
-      TaskRunnerProvider* task_runner_provider);
-
   ~ProxyMain() override;
 
   // Commits between the main and impl threads are processed through a pipeline