[Presentation API] Change ListenForSessionMessages API to client-style.

chrome/browser/media/android/router/media_router_android.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 "chrome/browser/media/android/router/media_router_android.h"
 
 #include "base/logging.h"
 
 namespace media_router {
 
@@ skipping 21 matching lines @@
 }
 void MediaRouterAndroid::CloseRoute(const MediaRoute::Id& route_id) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::SendRouteMessage(
     const MediaRoute::Id& route_id,
     const std::string& message,
     const SendRouteMessageCallback& callback) {
   NOTIMPLEMENTED();
 }
-void MediaRouterAndroid::ListenForRouteMessages(
-    const std::vector<MediaRoute::Id>& route_ids,
-    const PresentationSessionMessageCallback& message_cb) {
-  NOTIMPLEMENTED();
-}
 void MediaRouterAndroid::ClearIssue(const Issue::Id& issue_id) {
   NOTIMPLEMENTED();
 }
 
 void MediaRouterAndroid::RegisterMediaSinksObserver(
     MediaSinksObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::UnregisterMediaSinksObserver(
     MediaSinksObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::RegisterMediaRoutesObserver(
     MediaRoutesObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::UnregisterMediaRoutesObserver(
     MediaRoutesObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::RegisterIssuesObserver(IssuesObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::UnregisterIssuesObserver(IssuesObserver* observer) {
   NOTIMPLEMENTED();
 }
+void MediaRouterAndroid::RegisterPresentationSessionMessagesObserver(
+    PresentationSessionMessagesObserver* observer) {
+  NOTIMPLEMENTED();
+}
+void MediaRouterAndroid::UnregisterPresentationSessionMessagesObserver(
+    PresentationSessionMessagesObserver* observer) {
+  NOTIMPLEMENTED();
+}
 
 }  // namespace media_router