cc: Remove client/engine LayerTreeHostInProcess.

cc/trees/remote_proto_channel.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CC_TREES_REMOTE_PROTO_CHANNEL_H_
-#define CC_TREES_REMOTE_PROTO_CHANNEL_H_
-
-#include <memory>
-
-#include "cc/base/cc_export.h"
-
-namespace cc {
-
-namespace proto {
-class CompositorMessage;
-}
-
-// Provides a bridge for getting compositor protobuf messages to/from the
-// outside world.
-class CC_EXPORT RemoteProtoChannel {
- public:
-  // Meant to be implemented by a RemoteChannel that needs to receive and parse
-  // incoming protobufs.
-  class CC_EXPORT ProtoReceiver {
-   public:
-    // TODO(khushalsagar): This should probably include a closure that returns
-    // the status of processing this proto. See crbug/576974
-    virtual void OnProtoReceived(
-        std::unique_ptr<proto::CompositorMessage> proto) = 0;
-
-   protected:
-    virtual ~ProtoReceiver() {}
-  };
-
-  // Called by the ProtoReceiver. The RemoteProtoChannel must outlive its
-  // receiver.
-  virtual void SetProtoReceiver(ProtoReceiver* receiver) = 0;
-
-  virtual void SendCompositorProto(const proto::CompositorMessage& proto) = 0;
-
- protected:
-  virtual ~RemoteProtoChannel() {}
-};
-
-}  // namespace cc
-
-#endif  // CC_TREES_REMOTE_PROTO_CHANNEL_H_