Remove some unnecessary webkit/common/gpu and third_party/wtl deps

mojo/mojo_services.gypi

 # Copyright (c) 2014 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.
 
 {
   'targets': [
     {
       # GN version: //mojo/services/clipboard/
       'target_name': 'mojo_clipboard',
       'type': 'loadable_module',
@@ skipping 766 matching lines @@
           'type': 'loadable_module',
           'dependencies': [
             '../base/base.gyp:base',
             '../cc/cc.gyp:cc_surfaces',
             '../skia/skia.gyp:skia',
             '../ui/base/ui_base.gyp:ui_base',
             '../ui/events/events.gyp:events',
             '../ui/events/events.gyp:events_base',
             '../ui/gfx/gfx.gyp:gfx',
             '../ui/gfx/gfx.gyp:gfx_geometry',
-            '../webkit/common/gpu/webkit_gpu.gyp:webkit_gpu',
             'mojo_base.gyp:mojo_common_lib',
             'mojo_base.gyp:mojo_application_chromium',
             'mojo_base.gyp:mojo_common_lib',
             'mojo_geometry_bindings',
             'mojo_geometry_lib',
             'mojo_gpu_bindings',
             'mojo_input_events_bindings',
             'mojo_input_events_lib',
             'mojo_native_viewport_bindings',
             'mojo_surfaces_bindings',
@@ skipping 168 matching lines @@
               'dependencies': [
                 '../ui/gfx/x/gfx_x11.gyp:gfx_x11',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }