[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..e8d480790a5054a712900fedb45e8b96b26c4a75 100644
--- a/chrome/browser/media/router/test_helper.cc
+++ b/chrome/browser/media/router/test_helper.cc
@@ -28,12 +28,4 @@ MockEventPageTracker::MockEventPageTracker() {
 MockEventPageTracker::~MockEventPageTracker() {
 }
 
-MockPresentationConnectionStateObserver::
-    MockPresentationConnectionStateObserver(MediaRouter* router,
-                                            const MediaRoute::Id& route_id)
-    : PresentationConnectionStateObserver(router, route_id) {}
-
-MockPresentationConnectionStateObserver::
-    ~MockPresentationConnectionStateObserver() = default;
-
 }  // namespace media_router