ui/compositor: use cc/ directly instead of webkit

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 260 matching lines @@
       'defines': [
         'CC_IMPLEMENTATION=1',
       ],
       'include_dirs': [
         '<(webkit_src_dir)/Source/Platform/chromium',
         '<@(cc_stubs_dirs)',
       ],
       'sources': [
         '<@(cc_source_files)',
       ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          # Needed for <public/WebTransformationMatrix.h> in layer.h
+          '<(webkit_src_dir)/Source/Platform/chromium',
+        ],
+      }
     },
   ],
 }