[PresentationSevice] Use PresentationConnection to send messages from

content/public/browser/presentation_service_delegate.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 162 matching lines @@
                                int render_frame_id,
                                const std::string& presentation_id) = 0;
 
   // Terminates an existing presentation.
   // |render_process_id|, |render_frame_id|: ID for originating frame.
   // |presentation_id|: The ID of the presentation to terminate.
   virtual void Terminate(int render_process_id,
                          int render_frame_id,
                          const std::string& presentation_id) = 0;
 
-  // Listens for messages from a presentation.
-  // |render_process_id|, |render_frame_id|: ID for originating frame.
-  // |presentation_info|: URL and ID of presentation to listen for messages.
-  // |message_cb|: Invoked with a non-empty list of messages whenever there are
-  // messages.
-  virtual void ListenForConnectionMessages(
-      int render_process_id,
-      int render_frame_id,
-      const content::PresentationInfo& presentation_info,
-      const PresentationConnectionMessageCallback& message_cb) = 0;
-
   // Sends a message (string or binary data) to a presentation.
   // |render_process_id|, |render_frame_id|: ID of originating frame.
   // |presentation_info|: The presentation to send the message to.
   // |message|: The message to send. The embedder takes ownership of |message|.
   //            Must not be null.
   // |send_message_cb|: Invoked after handling the send message request.
   virtual void SendMessage(int render_process_id,
                            int render_frame_id,
                            const content::PresentationInfo& presentation_info,
                            PresentationConnectionMessage message,
@@ skipping 36 matching lines @@
   // |receiver_available_callback|: Invoked when successfully starting a
   // offscreen presentation.
   virtual void RegisterReceiverConnectionAvailableCallback(
       const content::ReceiverConnectionAvailableCallback&
           receiver_available_callback) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_SERVICE_DELEGATE_H_