Implement the close() API for Message ports

android_webview/browser/aw_message_port_message_filter.h

Index: android_webview/browser/aw_message_port_message_filter.h
diff --git a/android_webview/browser/aw_message_port_message_filter.h b/android_webview/browser/aw_message_port_message_filter.h
index 5e0b9a0b4a37a8dd964d4ac8833f2f14c0e75e22..4cd86ccb2eef4d3283ad5921d427a4ee38dd3967 100644
--- a/android_webview/browser/aw_message_port_message_filter.h
+++ b/android_webview/browser/aw_message_port_message_filter.h
@@ -25,7 +25,8 @@ class AwMessagePortMessageFilter : public content::BrowserMessageFilter,
 
   void SendAppToWebMessage(int msg_port_route_id,
                            const base::string16& message,
-                           const std::vector<int>& sent_message_port_ids);
+                           const std::vector<int>& sent_message_port_ids,
+                           bool close_port);
 
   // MessagePortDelegate implementation.
   void SendMessage(int msg_port_route_id,
@@ -40,7 +41,8 @@ class AwMessagePortMessageFilter : public content::BrowserMessageFilter,
   void OnConvertedAppToWebMessage(
       int msg_port_id,
       const base::string16& message,
-      const std::vector<int>& sent_message_port_ids);
+      const std::vector<int>& sent_message_port_ids,
+      bool close_port);
 
   ~AwMessagePortMessageFilter() override;