[Media Router] Connection state change listening redesign part 2.

chrome/browser/media/router/test_helper.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/router/test_helper.h"
 
 namespace media_router {
 
 MockIssuesObserver::MockIssuesObserver(MediaRouter* router)
     : IssuesObserver(router) {}
@@ skipping 10 matching lines @@
     : MediaRoutesObserver(router) {
 }
 MockMediaRoutesObserver::~MockMediaRoutesObserver() {
 }
 
 MockEventPageTracker::MockEventPageTracker() {
 }
 MockEventPageTracker::~MockEventPageTracker() {
 }
 
-MockPresentationConnectionStateObserver::
-    MockPresentationConnectionStateObserver(MediaRouter* router,
-                                            const MediaRoute::Id& route_id)
-    : PresentationConnectionStateObserver(router, route_id) {}
+MockPresentationConnectionStateChangedCallback::
+    MockPresentationConnectionStateChangedCallback() = default;
 
-MockPresentationConnectionStateObserver::
-    ~MockPresentationConnectionStateObserver() = default;
+MockPresentationConnectionStateChangedCallback::
+    ~MockPresentationConnectionStateChangedCallback() = default;
 
 }  // namespace media_router