Add the DelegatingRenderer class with its initialize path.

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': {
     'cc_source_files': [
       'active_animation.cc',
       'active_animation.h',
       'animation_curve.cc',
@@ skipping 28 matching lines @@
       'debug_colors.cc',
       'debug_colors.h',
       'debug_rect_history.cc',
       'debug_rect_history.h',
       'delay_based_time_source.cc',
       'delay_based_time_source.h',
       'delegated_renderer_layer.cc',
       'delegated_renderer_layer.h',
       'delegated_renderer_layer_impl.cc',
       'delegated_renderer_layer_impl.h',
+      'delegating_renderer.cc',
+      'delegating_renderer.h',
       'direct_renderer.cc',
       'direct_renderer.h',
       'draw_properties.h',
       'draw_quad.cc',
       'draw_quad.h',
       'font_atlas.cc',
       'font_atlas.h',
       'frame_rate_controller.cc',
       'frame_rate_controller.h',
       'frame_rate_counter.cc',
@@ skipping 240 matching lines @@
       ],
       'all_dependent_settings': {
         'include_dirs': [
           # Needed for <public/WebTransformationMatrix.h> in layer.h
           '<(webkit_src_dir)/Source/Platform/chromium',
         ],
       }
     },
   ],
 }