[MediaRouter] wireup send/receive messages.

content/browser/presentation/presentation_service_impl.cc

 // 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.
 
 #include "content/browser/presentation/presentation_service_impl.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "content/browser/presentation/presentation_type_converters.h"
@@ skipping 387 matching lines @@
 
   send_message_callback_.reset(new SendMessageMojoCallback(callback));
   delegate_->SendMessage(
       render_process_id_,
       render_frame_id_,
       GetPresentationSessionMessage(session_message.Pass()),
       base::Bind(&PresentationServiceImpl::OnSendMessageCallback,
                  weak_factory_.GetWeakPtr()));
 }
 
-void PresentationServiceImpl::OnSendMessageCallback() {
+void PresentationServiceImpl::OnSendMessageCallback(bool sent) {
   // It is possible that Reset() is invoked before receiving this callback.
   // So, always check send_message_callback_ for non-null.
   if (send_message_callback_) {
-    send_message_callback_->Run(true);
+    send_message_callback_->Run(sent);
     send_message_callback_.reset();
   }
 }
 
 void PresentationServiceImpl::CloseSession(
     const mojo::String& presentation_url,
     const mojo::String& presentation_id) {
   DVLOG(2) << "CloseSession " << presentation_id;
   if (delegate_)
     delegate_->CloseSession(render_process_id_, render_frame_id_,
@@ skipping 210 matching lines @@
 void PresentationServiceImpl::DefaultSessionStartContext::Reset() {
   ScopedVector<DefaultSessionMojoCallback> callbacks;
   callbacks.swap(callbacks_);
   for (const auto& callback : callbacks)
     callback->Run(presentation::PresentationSessionInfoPtr());
   session_.reset();
 }
 
 }  // namespace content