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 406 matching lines @@
         'quads/surface_draw_quad.cc',
         'quads/surface_draw_quad.h',
         'quads/texture_draw_quad.cc',
         'quads/texture_draw_quad.h',
         'quads/tile_draw_quad.cc',
         'quads/tile_draw_quad.h',
         'quads/yuv_video_draw_quad.cc',
         'quads/yuv_video_draw_quad.h',
         'raster/bitmap_tile_task_worker_pool.cc',
         'raster/bitmap_tile_task_worker_pool.h',
+        'raster/dependency_task.cc',
+        'raster/dependency_task.h',
         'raster/gpu_rasterizer.cc',
         'raster/gpu_rasterizer.h',
         'raster/gpu_tile_task_worker_pool.cc',
         'raster/gpu_tile_task_worker_pool.h',
         'raster/one_copy_tile_task_worker_pool.cc',
         'raster/one_copy_tile_task_worker_pool.h',
         'raster/raster_buffer.cc',
         'raster/raster_buffer.h',
         'raster/scoped_gpu_raster.cc',
         'raster/scoped_gpu_raster.h',
@@ skipping 267 matching lines @@
         'surfaces/surface_resource_holder.cc',
         'surfaces/surface_resource_holder.h',
         'surfaces/surfaces_export.h',
       ],
       'includes': [
         '../build/android/increase_size_for_speed.gypi',
       ],
     },
   ],
 }