cc: Remove SetLayerTreeHostClientReady()

cc/trees/channel_main.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_CHANNEL_MAIN_H_
 #define CC_TREES_CHANNEL_MAIN_H_
 
 #include "cc/base/cc_export.h"
 
 namespace cc {
 
 // ChannelMain and ChannelImpl provide an abstract communication layer for
 // the main and impl side of the compositor.
 //
 // The communication sequence between the 2 sides is:
 //
 // LayerTreeHost<-->ProxyMain<-->ChannelMain
 //                                      |
 //                                      |
 //                               ChannelImpl<-->ProxyImpl<-->LayerTreeHostImpl
 
 class CC_EXPORT ChannelMain {
  public:
   // Interface for commands sent to the ProxyImpl
   virtual void SetThrottleFrameProductionOnImpl(bool throttle) = 0;
-  virtual void SetLayerTreeHostClientReadyOnImpl() = 0;
 
   virtual ~ChannelMain() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_CHANNEL_MAIN_H_