Enables specifying mojo url mapping on command line

mojo/mojo.gyp

 # 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.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 264 matching lines @@
         'mojo_base.gyp:mojo_environment_chromium',
         'mojo_shell_lib',
         'mojo_test_app',
         'mojo_test_request_tracker_app',
         'mojo_test_service_bindings',
       ],
       'sources': [
         'shell/child_process_host_unittest.cc',
         'shell/dynamic_application_loader_unittest.cc',
         'shell/in_process_dynamic_service_runner_unittest.cc',
+        'shell/mojo_url_resolver_unittest.cc',
         'shell/shell_test_base.cc',
         'shell/shell_test_base.h',
         'shell/shell_test_base_unittest.cc',
         'shell/shell_test_main.cc',
       ],
       'conditions': [
         ['OS == "android"', {
           'dependencies': [
             '../testing/android/native_test.gyp:native_test_native_code',
           ],
@@ skipping 477 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'mojo_js_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }