Removing GL context rate limiting feature and related wrappers

cc/trees/layer_tree_host_client.h

 // Copyright 2012 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_LAYER_TREE_HOST_CLIENT_H_
 #define CC_TREES_LAYER_TREE_HOST_CLIENT_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
@@ skipping 40 matching lines @@
       scoped_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
       scoped_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events) = 0;
 
   // Called when page scale animation has completed.
   virtual void DidCompletePageScaleAnimation() = 0;
 
   // TODO(simonhong): Makes this to pure virtual function when client
   // implementation is ready.
   virtual void SendBeginFramesToChildren(const BeginFrameArgs& args) {}
 
-  // Requests that the client insert a rate limiting token in the shared main
-  // thread context's command stream that will block if the context gets too far
-  // ahead of the compositor's command stream. Only needed if the tree contains
-  // a TextureLayer that calls SetRateLimitContext(true).
-  virtual void RateLimitSharedMainThreadContext() {}
-
  protected:
   virtual ~LayerTreeHostClient() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_CLIENT_H_