cc: Simplify Task and its derived classes.

cc/cc.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 416 matching lines @@
         'raster/raster_buffer.cc',
         'raster/raster_buffer.h',
         'raster/scoped_gpu_raster.cc',
         'raster/scoped_gpu_raster.h',
         'raster/single_thread_task_graph_runner.cc',
         'raster/single_thread_task_graph_runner.h',
         'raster/staging_buffer_pool.cc',
         'raster/staging_buffer_pool.h',
         'raster/synchronous_task_graph_runner.cc',
         'raster/synchronous_task_graph_runner.h',
+        'raster/task.cc',
+        'raster/task.h',
         'raster/task_category.h',
-        'raster/task_graph_runner.cc',
         'raster/task_graph_runner.h',
         'raster/task_graph_work_queue.cc',
         'raster/task_graph_work_queue.h',
         'raster/texture_compressor.cc',
         'raster/texture_compressor.h',
         'raster/texture_compressor_etc1.cc',
         'raster/texture_compressor_etc1.h',
         'raster/tile_task_runner.cc',
         'raster/tile_task_runner.h',
         'raster/tile_task_worker_pool.cc',
@@ skipping 251 matching lines @@
         'surfaces/surface_resource_holder.cc',
         'surfaces/surface_resource_holder.h',
         'surfaces/surfaces_export.h',
       ],
       'includes': [
         '../build/android/increase_size_for_speed.gypi',
       ],
     },
   ],
 }