cc: Remove FinishAllRendering, as it doesn't do anything anymore.

cc/trees/threaded_channel.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_THREADED_CHANNEL_H_
 #define CC_TREES_THREADED_CHANNEL_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 84 matching lines @@
   void SetDeferCommitsOnImpl(bool defer_commits) override;
   void SetNeedsCommitOnImpl() override;
   void BeginMainFrameAbortedOnImpl(
       CommitEarlyOutReason reason,
       base::TimeTicks main_thread_start_time,
       std::vector<std::unique_ptr<SwapPromise>> swap_promises) override;
   void SetNeedsRedrawOnImpl(const gfx::Rect& damage_rect) override;
   void SetVisibleOnImpl(bool visible) override;
 
   // Blocking calls to ProxyImpl
-  void FinishAllRenderingOnImpl(CompletionEvent* completion) override;
   void ReleaseOutputSurfaceOnImpl(CompletionEvent* completion) override;
   void MainFrameWillHappenOnImplForTesting(
       CompletionEvent* completion,
       bool* main_frame_will_happen) override;
   void NotifyReadyToCommitOnImpl(CompletionEvent* completion,
                                  LayerTreeHost* layer_tree_host,
                                  base::TimeTicks main_thread_start_time,
                                  bool hold_commit_for_activation) override;
   void SynchronouslyInitializeImpl(
       LayerTreeHost* layer_tree_host,
@@ skipping 91 matching lines @@
   // Used on the main thread to safely queue calls to ProxyImpl to be run on the
   // impl thread.
   base::WeakPtr<ProxyImpl> proxy_impl_weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadedChannel);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREADED_CHANNEL_H_