[Android WebView] Implement support for Network Information API and enable it.

android_webview/android_webview.gyp

 # Copyright 2009 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,
     'system_webview_package_name%': 'com.android.webview',
   },
   'targets': [
     {
@@ skipping 336 matching lines @@
         'browser/input_stream.h',
         'browser/jni_dependency_factory.h',
         'browser/gl_view_renderer_manager.cc',
         'browser/gl_view_renderer_manager.h',
         'browser/net/android_stream_reader_url_request_job.cc',
         'browser/net/android_stream_reader_url_request_job.h',
         'browser/net/aw_cookie_store_wrapper.cc',
         'browser/net/aw_cookie_store_wrapper.h',
         'browser/net/aw_http_user_agent_settings.h',
         'browser/net/aw_http_user_agent_settings.cc',
+        'browser/net/aw_network_change_notifier.cc',
+        'browser/net/aw_network_change_notifier.h',
+        'browser/net/aw_network_change_notifier_factory.cc',
+        'browser/net/aw_network_change_notifier_factory.h',
         'browser/net/aw_network_delegate.cc',
         'browser/net/aw_network_delegate.h',
         'browser/net/aw_request_interceptor.cc',
         'browser/net/aw_request_interceptor.h',
         'browser/net/aw_url_request_context_getter.cc',
         'browser/net/aw_url_request_context_getter.h',
         'browser/net/aw_url_request_job_factory.cc',
         'browser/net/aw_url_request_job_factory.h',
         'browser/net/aw_web_resource_response.h',
         'browser/net/init_native_callback.h',
@@ skipping 136 matching lines @@
           'includes': [ 'apk/system_webview_apk_common.gypi' ],
         },
       ],
     }]
   ],
   'includes': [
     'android_webview_tests.gypi',
     'apk/system_webview_paks.gypi',
   ],
 }