Adds a way to associate key/value pairs with the environment

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 239 matching lines @@
         'MOJO_COMMON_IMPLEMENTATION',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         'mojo_system',
       ],
       'sources': [
         'common/common_type_converters.cc',
         'common/common_type_converters.h',
+        'common/environment_data.cc',
+        'common/environment_data.h',
         'common/handle_watcher.cc',
         'common/handle_watcher.h',
         'common/message_pump_mojo.cc',
         'common/message_pump_mojo.h',
         'common/message_pump_mojo_handler.h',
         'common/time_helper.cc',
         'common/time_helper.h',
       ],
     },
     {
@@ skipping 180 matching lines @@
       ],
     },
     {
       'target_name': 'mojo_service_manager_unittests',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
         '../url/url.gyp:url_lib',
         'mojo_bindings',
+        'mojo_common_lib',
         'mojo_environment_chromium',
         'mojo_run_all_unittests',
         'mojo_service_manager',
         'mojo_shell_client',
         'mojo_system',
       ],
       'variables': {
         'mojom_base_output_dir': 'mojo',
       },
       'includes': [ 'public/bindings/mojom_bindings_generator.gypi' ],
@@ skipping 136 matching lines @@
             'mojo_js_unittests.isolate',
           ],
           'sources': [
             'mojo_js_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }