Make mojo_system static and mojo_system_impl a component, never use both

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 1421 matching lines @@
         ['include', '^browser/signed_certificate_timestamp_store_impl\\.cc$'],
         ['include', '^browser/user_metrics\\.cc$'],
         ['include', '^browser/web_contents/navigation_entry_impl\\.cc$'],
       ],
     }, {  # OS!="ios"
       'dependencies': [
         'browser/devtools/devtools_resources.gyp:devtools_resources',
         'content_common_mojo_bindings',
         '../cc/cc.gyp:cc',
         '../mojo/mojo.gyp:mojo_bindings',
-        '../mojo/mojo.gyp:mojo_system',
         '../net/net.gyp:http_server',
         '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
         '../ui/surface/surface.gyp:surface',
         '../webkit/common/webkit_common.gyp:webkit_common',
         '../webkit/storage_browser.gyp:webkit_storage_browser',
         '../webkit/storage_common.gyp:webkit_storage_common',
         '../webkit/webkit_resources.gyp:webkit_resources',
         '../webkit/webkit_resources.gyp:webkit_strings',
         '../third_party/angle/src/build_angle.gyp:commit_id',
       ],
@@ skipping 300 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }