cc: Clean up LayerTreeTest and TestHooks.

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <stddef.h>
 
 #include <bitset>
@@ skipping 218 matching lines @@
     bool has_no_damage;
 
     // RenderPassSink implementation.
     void AppendRenderPass(std::unique_ptr<RenderPass> render_pass) override;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(FrameData);
   };
 
   virtual void BeginMainFrameAborted(CommitEarlyOutReason reason);
+  virtual void ReadyToCommit() {}  // For tests.
   virtual void BeginCommit();
   virtual void CommitComplete();
   virtual void UpdateAnimationState(bool start_ready_animations);
   bool Mutate(base::TimeTicks monotonic_time);
   void ActivateAnimations();
   void Animate();
   void AnimatePendingTreeAfterCommit();
   void MainThreadHasStoppedFlinging();
   void DidAnimateScrollOffset();
   void SetViewportDamage(const gfx::Rect& damage_rect);
@@ skipping 600 matching lines @@
 
   std::unique_ptr<PendingTreeDurationHistogramTimer>
       pending_tree_duration_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_