Remove runtime toggling of throttling frames

cc/trees/proxy_impl.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_PROXY_IMPL_H_
 #define CC_TREES_PROXY_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/completion_event.h"
@@ skipping 13 matching lines @@
  public:
   static scoped_ptr<ProxyImpl> Create(
       ChannelImpl* channel_impl,
       LayerTreeHost* layer_tree_host,
       TaskRunnerProvider* task_runner_provider,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
 
   ~ProxyImpl() override;
 
   // Virtual for testing.
-  virtual void SetThrottleFrameProductionOnImpl(bool throttle);
   virtual void UpdateTopControlsStateOnImpl(TopControlsState constraints,
                                             TopControlsState current,
                                             bool animate);
   virtual void InitializeOutputSurfaceOnImpl(OutputSurface* output_surface);
   virtual void MainThreadHasStoppedFlingingOnImpl();
   virtual void SetInputThrottledUntilCommitOnImpl(bool is_throttled);
   virtual void SetDeferCommitsOnImpl(bool defer_commits) const;
   virtual void SetNeedsRedrawOnImpl(const gfx::Rect& damage_rect);
   virtual void SetNeedsCommitOnImpl();
   virtual void BeginMainFrameAbortedOnImpl(
@@ skipping 122 matching lines @@
   // Use accessors instead of this variable directly.
   BlockedMainCommitOnly main_thread_blocked_commit_vars_unsafe_;
   BlockedMainCommitOnly& blocked_main_commit();
 
   DISALLOW_COPY_AND_ASSIGN(ProxyImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROXY_IMPL_H_