cc: Remove code for drawing checkerboard quads, it's not used.

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 360 matching lines @@
         'playback/picture_pile_impl.cc',
         'playback/picture_pile_impl.h',
         'playback/pixel_ref_map.cc',
         'playback/pixel_ref_map.h',
         'playback/raster_source.h',
         'playback/raster_source_helper.cc',
         'playback/raster_source_helper.h',
         'playback/recording_source.h',
         'playback/transform_display_item.cc',
         'playback/transform_display_item.h',
-        'quads/checkerboard_draw_quad.cc',
-        'quads/checkerboard_draw_quad.h',
         'quads/content_draw_quad_base.cc',
         'quads/content_draw_quad_base.h',
         'quads/debug_border_draw_quad.cc',
         'quads/debug_border_draw_quad.h',
         'quads/draw_polygon.cc',
         'quads/draw_polygon.h',
         'quads/draw_quad.cc',
         'quads/draw_quad.h',
         'quads/io_surface_draw_quad.cc',
         'quads/io_surface_draw_quad.h',
@@ skipping 222 matching lines @@
         'surfaces/surface_resource_holder.cc',
         'surfaces/surface_resource_holder.h',
         'surfaces/surfaces_export.h',
       ],
       'includes': [
         '../build/android/increase_size_for_speed.gypi',
       ],
     },
   ],
 }