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

chrome/browser/media/router/test_helper.cc

Index: chrome/browser/media/router/test_helper.cc
diff --git a/chrome/browser/media/router/test_helper.cc b/chrome/browser/media/router/test_helper.cc
index 1bba86fa2d8c4b362c59c133a7d3d1fa80bff922..721682480b24e2282a526c4ae88e14b0236b3642 100644
--- a/chrome/browser/media/router/test_helper.cc
+++ b/chrome/browser/media/router/test_helper.cc
@@ -28,12 +28,10 @@ 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