Allow WebExternalTextureLayerClient to work with mailboxes.

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': {
     'chromium_code': 1,
     'webkit_compositor_bindings_sources': [
       'web_animation_curve_common.cc',
       'web_animation_curve_common.h',
@@ skipping 51 matching lines @@
         '../..',
         '<(SHARED_INTERMEDIATE_DIR)/webkit',
       ],
     },
     {
       'target_name': 'webkit_compositor_bindings',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../cc/cc.gyp:cc',
+        '../../gpu/gpu.gyp:gpu',
         '../../media/media.gyp:media',
         '../../skia/skia.gyp:skia',
         '../../ui/ui.gyp:ui',
         '../../webkit/gpu/webkit_gpu.gyp:webkit_gpu',
         '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
       ],
       'sources': [
         '<@(webkit_compositor_bindings_sources)',
       ],
       'defines': [
         'WEBKIT_COMPOSITOR_BINDINGS_IMPLEMENTATION=1'
       ]
     },
   ],
 }