Stop linking in the old Mojo EDK.

device/device_tests.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,
   },
   'targets': [
     {
       'target_name': 'device_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:test_support_base',
         '../mojo/mojo_base.gyp:mojo_environment_chromium',
+        '../mojo/mojo_edk.gyp:mojo_system_impl',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
-        '../third_party/mojo/mojo_edk.gyp:mojo_system_impl',
         '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
         '../tools/usb_gadget/usb_gadget.gyp:usb_gadget',
         'battery/battery.gyp:device_battery',
         'battery/battery.gyp:device_battery_mojo_bindings',
         'bluetooth/bluetooth.gyp:device_bluetooth',
         'bluetooth/bluetooth.gyp:device_bluetooth_mocks',
         'core/core.gyp:device_core',
         'core/core.gyp:device_core_mocks',
         'devices_app/devices_app.gyp:devices_app_lib',
         'nfc/nfc.gyp:device_nfc',
@@ skipping 225 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'device_unittests.isolate',
           ]
         }
       ]
     }]
   ],
 }