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

android_webview/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/config/locales.gni")
 import("//tools/grit/repack.gni")
 import("system_webview_apk_tmpl.gni")
 import("webview_repack_locales.gni")
@@ skipping 432 matching lines @@
     "browser/icon_helper.cc",
     "browser/icon_helper.h",
     "browser/input_stream.h",
     "browser/jni_dependency_factory.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.cc",
     "browser/net/aw_http_user_agent_settings.h",
+    "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 197 matching lines @@
     android_manifest = get_target_outputs(":system_webview_manifest")
     android_manifest = android_manifest[1]
     android_manifest_dep = ":system_webview_manifest"
     deps = [
       ":system_webview_resources",
       "//android_webview/glue",
     ]
     apk_name = "SystemWebView"
   }
 }