cc: Made use color estimator a const instead of a flag.

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 <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 187 matching lines @@
   // scheduled tasks. Reply callbacks are still guaranteed to run.
   virtual void Shutdown() OVERRIDE;
 
   // Schedule running of raster tasks in |queue| and all dependencies.
   // Previously scheduled tasks that are no longer needed to run
   // raster tasks in |queue| will be canceled unless already running.
   // Once scheduled, reply callbacks are guaranteed to run for all tasks
   // even if they later get canceled by another call to ScheduleTasks().
   virtual void ScheduleTasks(RasterTask::Queue* queue) = 0;
 
-  // TODO(vmpstr): Try to elimiate some variables.
   static RasterTask CreateRasterTask(
       const Resource* resource,
       PicturePileImpl* picture_pile,
       gfx::Rect content_rect,
       float contents_scale,
       RasterMode raster_mode,
-      bool use_color_estimator,
       const RasterTaskMetadata& metadata,
       RenderingStatsInstrumentation* rendering_stats,
       const RasterTask::Reply& reply,
       Task::Set* dependencies);
 
   static Task CreateImageDecodeTask(
       skia::LazyPixelRef* pixel_ref,
       int layer_id,
       RenderingStatsInstrumentation* stats_instrumentation,
       const Task::Reply& reply);
@@ skipping 49 matching lines @@
   RasterTask::Queue::TaskSet raster_tasks_required_for_activation_;
 
   base::WeakPtrFactory<RasterWorkerPool> weak_ptr_factory_;
   scoped_refptr<internal::WorkerPoolTask> raster_finished_task_;
   int64 schedule_raster_tasks_count_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_WORKER_POOL_H_