cc: Remove all traces of SkPicture cloning.

cc/resources/raster_worker_pool.h

 // Copyright 2013 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_RESOURCES_RASTER_WORKER_POOL_H_
 #define CC_RESOURCES_RASTER_WORKER_POOL_H_
 
 #include "cc/resources/rasterizer.h"
 
 namespace base {
@@ skipping 17 matching lines @@
   // This can only be called once and must be called prior to
   // GetNumRasterThreads().
   static void SetNumRasterThreads(int num_threads);
 
   // Returns the number of threads used for the global TaskGraphRunner instance.
   static int GetNumRasterThreads();
 
   // Returns a pointer to the global TaskGraphRunner instance.
   static TaskGraphRunner* GetTaskGraphRunner();
 
-  // Returns a unique clone index for the current thread. Guaranteed to be a
-  // value between 0 and GetNumRasterThreads() - 1.
-  static size_t GetPictureCloneIndexForCurrentThread();
-
   // Utility function that can be used to create a "raster finished" task that
   // posts |callback| to |task_runner| when run.
   static scoped_refptr<RasterizerTask> CreateRasterFinishedTask(
       base::SequencedTaskRunner* task_runner,
       const base::Closure& callback);
 
   // Utility function that can be used to create a "raster required for
   // activation finished" task that posts |callback| to |task_runner| when run.
   static scoped_refptr<RasterizerTask>
       CreateRasterRequiredForActivationFinishedTask(
@@ skipping 22 matching lines @@
       const ImageDecodeTask::Vector& decode_tasks,
       unsigned priority);
 
   // Type-checking downcast routine.
   virtual Rasterizer* AsRasterizer() = 0;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_WORKER_POOL_H_