Remove runtime toggling of throttling frames

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"
 #include "cc/base/completion_event.h"
 #include "cc/input/top_controls_state.h"
@@ skipping 12 matching lines @@
 // LayerTreeHost<-->ProxyMain<-->ChannelMain
 //                                      |
 //                                      |
 //                               ChannelImpl<-->ProxyImpl<-->LayerTreeHostImpl
 
 class CC_EXPORT ChannelMain {
  public:
   virtual ~ChannelMain() {}
 
   // Interface for commands sent to ProxyImpl
-  virtual void SetThrottleFrameProductionOnImpl(bool throttle) = 0;
   virtual void UpdateTopControlsStateOnImpl(TopControlsState constraints,
                                             TopControlsState current,
                                             bool animate) = 0;
   virtual void InitializeOutputSurfaceOnImpl(OutputSurface* output_surface) = 0;
   virtual void MainThreadHasStoppedFlingingOnImpl() = 0;
   virtual void SetInputThrottledUntilCommitOnImpl(bool is_throttled) = 0;
   virtual void SetDeferCommitsOnImpl(bool defer_commits) = 0;
   virtual void FinishAllRenderingOnImpl(CompletionEvent* completion) = 0;
   virtual void SetVisibleOnImpl(bool visible) = 0;
   virtual void ReleaseOutputSurfaceOnImpl(CompletionEvent* completion) = 0;
@@ skipping 15 matching lines @@
       LayerTreeHost* layer_tree_host,
       scoped_ptr<BeginFrameSource> external_begin_frame_source) = 0;
 
   // Must be called before deleting the channel.
   virtual void SynchronouslyCloseImpl() = 0;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_CHANNEL_MAIN_H_