Enable posting a message from JS to Android webview.

android_webview/renderer/aw_content_renderer_client.cc

 // Copyright 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.
 
 #include "android_webview/renderer/aw_content_renderer_client.h"
 
 #include "android_webview/common/aw_resource.h"
 #include "android_webview/common/render_view_messages.h"
 #include "android_webview/common/url_constants.h"
 #include "android_webview/renderer/aw_key_systems.h"
+#include "android_webview/renderer/aw_message_port_client.h"
 #include "android_webview/renderer/aw_permission_client.h"
 #include "android_webview/renderer/aw_render_frame_ext.h"
 #include "android_webview/renderer/aw_render_view_ext.h"
 #include "android_webview/renderer/print_render_frame_observer.h"
 #include "android_webview/renderer/print_web_view_helper.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/content/renderer/autofill_agent.h"
 #include "components/autofill/content/renderer/password_autofill_agent.h"
 #include "components/visitedlink/renderer/visitedlink_slave.h"
@@ skipping 94 matching lines @@
   RenderThread::Get()->Send(new AwViewHostMsg_ShouldOverrideUrlLoading(
       render_frame_id, url, &ignore_navigation));
   return ignore_navigation;
 }
 
 void AwContentRendererClient::RenderFrameCreated(
     content::RenderFrame* render_frame) {
   new AwPermissionClient(render_frame);
   new PrintRenderFrameObserver(render_frame);
   new AwRenderFrameExt(render_frame);
+  new AwMessagePortClient(render_frame);
 
   // TODO(jam): when the frame tree moves into content and parent() works at
   // RenderFrame construction, simplify this by just checking parent().
   content::RenderFrame* parent_frame =
       render_frame->GetRenderView()->GetMainRenderFrame();
   if (parent_frame && parent_frame != render_frame) {
     // Avoid any race conditions from having the browser's UI thread tell the IO
     // thread that a subframe was created.
     RenderThread::Get()->Send(new AwViewHostMsg_SubFrameCreated(
         parent_frame->GetRoutingID(), render_frame->GetRoutingID()));
@@ skipping 65 matching lines @@
 
 bool AwContentRendererClient::ShouldOverridePageVisibilityState(
     const content::RenderFrame* render_frame,
     blink::WebPageVisibilityState* override_state) {
   // webview is always visible due to rendering requirements.
   *override_state = blink::WebPageVisibilityStateVisible;
   return true;
 }
 
 }  // namespace android_webview