Add a unified observer to replace NetworkManagerObserver

chrome/chrome_browser_chromeos.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.
 
 {
   'targets': [
     {
       'target_name': 'browser_chromeos',
       'type': 'static_library',
@@ skipping 522 matching lines @@
         'browser/chromeos/memory/low_memory_observer.cc',
         'browser/chromeos/memory/low_memory_observer.h',
         'browser/chromeos/memory/oom_priority_manager.cc',
         'browser/chromeos/memory/oom_priority_manager.h',
         'browser/chromeos/mobile/mobile_activator.cc',
         'browser/chromeos/mobile/mobile_activator.h',
         'browser/chromeos/mobile_config.cc',
         'browser/chromeos/mobile_config.h',
         'browser/chromeos/net/connectivity_state_helper.cc',
         'browser/chromeos/net/connectivity_state_helper.h',
+        'browser/chromeos/net/connectivity_state_helper_observer.h',
         'browser/chromeos/net/cros_network_change_notifier_factory.cc',
         'browser/chromeos/net/cros_network_change_notifier_factory.h',
         'browser/chromeos/net/managed_network_configuration_handler.cc',
         'browser/chromeos/net/managed_network_configuration_handler.h',
         'browser/chromeos/net/network_change_notifier_network_library.cc',
         'browser/chromeos/net/network_change_notifier_network_library.h',
         'browser/chromeos/net/network_portal_detector.cc',
         'browser/chromeos/net/network_portal_detector.h',
         'browser/chromeos/net/onc_utils.cc',
         'browser/chromeos/net/onc_utils.h',
@@ skipping 314 matching lines @@
         'browser/chromeos/policy/proto/install_attributes.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/policy/proto',
         'proto_out_dir': 'chrome/browser/chromeos/policy/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }