Enable posting a message from JS to Android webview.

android_webview/native/webview_native.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'webview_native',
@@ skipping 40 matching lines @@
         'aw_contents_statics.cc',
         'aw_contents_statics.h',
         'aw_dev_tools_server.cc',
         'aw_dev_tools_server.h',
         'aw_form_database.cc',
         'aw_form_database.h',
         'aw_http_auth_handler.cc',
         'aw_http_auth_handler.h',
         'aw_media_url_interceptor.cc',
         'aw_media_url_interceptor.h',
+        'aw_message_port_service_impl.cc',
+        'aw_messagE_port_service_impl.h',
         'aw_pdf_exporter.cc',
         'aw_pdf_exporter.h',
         'aw_picture.cc',
         'aw_picture.h',
         'aw_quota_manager_bridge_impl.cc',
         'aw_quota_manager_bridge_impl.h',
         'aw_resource.cc',
         'aw_resource.h',
         'aw_settings.cc',
         'aw_settings.h',
@@ skipping 53 matching lines @@
           '../java/src/org/chromium/android_webview/AwAssets.java',
           '../java/src/org/chromium/android_webview/AwAutofillClient.java',
           '../java/src/org/chromium/android_webview/AwContents.java',
           '../java/src/org/chromium/android_webview/AwContentsClientBridge.java',
           '../java/src/org/chromium/android_webview/AwContentsIoThreadClient.java',
           '../java/src/org/chromium/android_webview/AwContentsStatics.java',
           '../java/src/org/chromium/android_webview/AwCookieManager.java',
           '../java/src/org/chromium/android_webview/AwDevToolsServer.java',
           '../java/src/org/chromium/android_webview/AwFormDatabase.java',
           '../java/src/org/chromium/android_webview/AwHttpAuthHandler.java',
+          '../java/src/org/chromium/android_webview/AwMessagePortService.java',
           '../java/src/org/chromium/android_webview/AwPdfExporter.java',
           '../java/src/org/chromium/android_webview/AwPicture.java',
           '../java/src/org/chromium/android_webview/AwQuotaManagerBridge.java',
           '../java/src/org/chromium/android_webview/AwResource.java',
           '../java/src/org/chromium/android_webview/AwSettings.java',
           '../java/src/org/chromium/android_webview/AwWebContentsDelegate.java',
           '../java/src/org/chromium/android_webview/AwWebResourceResponse.java',
           '../java/src/org/chromium/android_webview/ExternalVideoSurfaceContainer.java',
           '../java/src/org/chromium/android_webview/InputStreamUtil.java',
           '../java/src/org/chromium/android_webview/JavaBrowserViewRendererHelper.java',
           '../java/src/org/chromium/android_webview/permission/AwPermissionRequest.java',
       ],
       'variables': {
         'jni_gen_package': 'android_webview',
       },
       'includes': [ '../../build/jni_generator.gypi' ],
       'dependencies': [
         'cancellation_signal_android_jar_jni_headers',
       ],
     },
   ],
 }