cc: Create a LayerScrollClient interface and an adapter class in compositor_bindings.

webkit/renderer/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': {
     'chromium_code': 1,
     'webkit_compositor_bindings_sources': [
       'scrollbar_impl.cc',
       'scrollbar_impl.h',
@@ skipping 13 matching lines @@
       'web_image_layer_impl.cc',
       'web_image_layer_impl.h',
       'web_layer_impl.cc',
       'web_layer_impl.h',
       'web_layer_impl_fixed_bounds.cc',
       'web_layer_impl_fixed_bounds.h',
       'web_to_ccscrollbar_theme_painter_adapter.cc',
       'web_to_ccscrollbar_theme_painter_adapter.h',
       'web_to_cc_animation_delegate_adapter.cc',
       'web_to_cc_animation_delegate_adapter.h',
+      'web_to_cc_layer_scroll_client_adapter.cc',
+      'web_to_cc_layer_scroll_client_adapter.h',
       'web_scrollbar_layer_impl.cc',
       'web_scrollbar_layer_impl.h',
       'web_solid_color_layer_impl.cc',
       'web_solid_color_layer_impl.h',
       'web_transform_operations_impl.cc',
       'web_transform_operations_impl.h',
       'web_transform_animation_curve_impl.cc',
       'web_transform_animation_curve_impl.h',
     ],
   },
@@ skipping 30 matching lines @@
       ],
       'sources': [
         '<@(webkit_compositor_bindings_sources)',
       ],
       'defines': [
         'WEBKIT_COMPOSITOR_BINDINGS_IMPLEMENTATION=1'
       ]
     },
   ],
 }