Remove Mojo bindings environment.

content/content_child.gypi

 # Copyright 2013 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/mime_util/mime_util.gyp:mime_util',
     '../components/scheduler/scheduler.gyp:scheduler',
     '../components/tracing.gyp:tracing',
     '../components/webcrypto/webcrypto.gyp:webcrypto',
     '../ipc/ipc.gyp:ipc',
-    '../mojo/mojo_base.gyp:mojo_environment_chromium',
     '../mojo/mojo_base.gyp:mojo_common_lib',
     '../mojo/mojo_public.gyp:mojo_message_pump_lib',
     '../skia/skia.gyp:skia',
     '../storage/storage_common.gyp:storage_common',
     '../third_party/WebKit/public/blink.gyp:blink',
     '../third_party/WebKit/public/blink_resources.gyp:blink_image_resources',
     '../third_party/WebKit/public/blink_resources.gyp:blink_resources',
     '../third_party/npapi/npapi.gyp:npapi',
     '../ui/base/ui_base.gyp:ui_base',
     '../ui/events/events.gyp:gestures_blink',
@@ skipping 298 matching lines @@
         'child/npapi/webplugin_delegate_impl_mac.mm',
       ],
     }],
     ['OS=="win"', {
       'sources!': [
         'child/npapi/webplugin_delegate_impl_aura.cc',
       ],
     }],
   ],
 }