Revert of cc/blimp: Add a LayerTreeHostRemote implementation.

cc/blimp/remote_compositor_bridge.h

-// Copyright 2016 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_BLIMP_REMOTE_COMPOSITOR_BRIDGE_H_
-#define CC_BLIMP_REMOTE_COMPOSITOR_BRIDGE_H_
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "cc/base/cc_export.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
-namespace cc {
-class CompositorProtoState;
-class RemoteCompositorBridgeClient;
-
-// The RemoteCompositorBridge is the remote LTH's communication bridge to the
-// compositor on the client that consumes the CompositorProtoState updates and
-// performs the actual compositing work. It is responsible for scheduling
-// when a state update should be sent to the client and providing back
-// mutations made to the state on the client.
-class CC_EXPORT RemoteCompositorBridge {
- public:
-  RemoteCompositorBridge(
-      scoped_refptr<base::SingleThreadTaskRunner> compositor_main_task_runner);
-
-  virtual ~RemoteCompositorBridge();
-
-  // Must be called exactly once before the RemoteCompositorBridge can be
-  // used. Once bound, the client is expected to outlive this class.
-  virtual void BindToClient(RemoteCompositorBridgeClient* client) = 0;
-
-  // Notifies the bridge that a main frame update is required.
-  virtual void ScheduleMainFrame() = 0;
-
-  // If a main frame update results in any mutations to the compositor state,
-  // the serialized compositor state is provided to the
-  // RemoteCompositorBridge.
-  virtual void ProcessCompositorStateUpdate(
-      std::unique_ptr<CompositorProtoState> compositor_proto_state) = 0;
-
- protected:
-  // The task runner for the compositor's main thread. The
-  // RemoteCompositorBridgeClient must be called on this task runner.
-  scoped_refptr<base::SingleThreadTaskRunner> compositor_main_task_runner_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(RemoteCompositorBridge);
-};
-
-}  // namespace cc
-#endif  // CC_BLIMP_REMOTE_COMPOSITOR_BRIDGE_H_