cc: Replace the WebCore::UnitBezier class with the SkUnitCubicInterp() method from Skia.

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 246 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/UnitBezier.h',
 
         'stubs/config.h',
-        'stubs/unit_bezier.h',
       ],
     },
   ],
 }