Allow WebExternalTextureLayers to receive a bitmap along with a mailbox

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',
       'web_animation_curve_common.cc',
       'web_animation_curve_common.h',
       'web_animation_impl.cc',
       'web_animation_impl.h',
       'web_compositing_reasons.cc',
       'web_content_layer_impl.cc',
       'web_content_layer_impl.h',
+      'web_external_bitmap_impl.cc',
+      'web_external_bitmap_impl.h',
       'web_external_texture_layer_impl.cc',
       'web_external_texture_layer_impl.h',
       'web_filter_operations_impl.cc',
       'web_filter_operations_impl.h',
       'web_float_animation_curve_impl.cc',
       'web_float_animation_curve_impl.h',
       'web_image_layer_impl.cc',
       'web_image_layer_impl.h',
       'web_layer_impl.cc',
       'web_layer_impl.h',
@@ skipping 46 matching lines @@
       ],
       'sources': [
         '<@(webkit_compositor_bindings_sources)',
       ],
       'defines': [
         'WEBKIT_COMPOSITOR_BINDINGS_IMPLEMENTATION=1'
       ]
     },
   ],
 }