cc: Create a Region class that wraps SkRegion, to replace use of WebCore::Region.

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 109 matching lines @@
       'priority_calculator.h',
       'program_binding.cc',
       'program_binding.h',
       'proxy.cc',
       'proxy.h',
       'quad_culler.cc',
       'quad_culler.h',
       'quad_sink.h',
       'rate_limiter.cc',
       'rate_limiter.h',
+      'region.cc',
+      'region.h',
       'render_pass.cc',
       'render_pass.h',
       'render_pass_draw_quad.cc',
       'render_pass_draw_quad.h',
       'render_pass_sink.h',
       'render_surface.cc',
       'render_surface.h',
       'render_surface_filters.cc',
       'render_surface_filters.h',
       'render_surface_impl.cc',
@@ skipping 116 matching lines @@
       ],
       'defines': [
         'CC_IMPLEMENTATION=1',
       ],
       'include_dirs': [
         '<(webkit_src_dir)/Source/Platform/chromium',
         '<@(cc_stubs_dirs)',
       ],
       'sources': [
         '<@(cc_source_files)',
-        'stubs/Region.h',
-
         'stubs/config.h',
       ],
     },
   ],
 }