cc: Create a cc::ScrollbarThemePainter and an adapter class in compositor bindings.

webkit/compositor_bindings/compositor_bindings.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': {
     'webkit_compositor_bindings_sources': [
       'web_animation_curve_common.cc',
       'web_animation_curve_common.h',
       'web_animation_impl.cc',
@@ skipping 13 matching lines @@
       'web_io_surface_layer_impl.cc',
       'web_io_surface_layer_impl.h',
       'web_image_layer_impl.cc',
       'web_image_layer_impl.h',
       'web_layer_impl.cc',
       'web_layer_impl.h',
       'web_nine_patch_layer_impl.cc',
       'web_nine_patch_layer_impl.h',
       'web_to_ccinput_handler_adapter.cc',
       'web_to_ccinput_handler_adapter.h',
+      'web_to_ccscrollbar_theme_painter_adapter.cc',
+      'web_to_ccscrollbar_theme_painter_adapter.h',
       'web_layer_tree_view_impl.cc',
       'web_layer_tree_view_impl.h',
       'web_scrollbar_layer_impl.cc',
       'web_scrollbar_layer_impl.h',
       'web_solid_color_layer_impl.cc',
       'web_solid_color_layer_impl.h',
       'web_video_layer_impl.cc',
       'web_video_layer_impl.h',
       'web_transform_animation_curve_impl.cc',
       'web_transform_animation_curve_impl.h',
@@ skipping 38 matching lines @@
         '../../cc',
         '<@(cc_stubs_dirs)',
         '<(webkit_src_dir)/Source/Platform/chromium',
       ],
       'sources': [
         '<@(webkit_compositor_bindings_sources)',
       ],
     },
   ],
 }