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

chrome/browser/media/router/presentation_connection_state_observer.cc

Index: chrome/browser/media/router/presentation_connection_state_observer.cc
diff --git a/chrome/browser/media/router/presentation_connection_state_observer.cc b/chrome/browser/media/router/presentation_connection_state_observer.cc
deleted file mode 100644
index 47f342cedabf8f9ec1ef1b694f5c2c80ce03feda..0000000000000000000000000000000000000000
--- a/chrome/browser/media/router/presentation_connection_state_observer.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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/presentation_connection_state_observer.h"
-
-#include "base/logging.h"
-#include "chrome/browser/media/router/media_router.h"
-
-namespace media_router {
-
-PresentationConnectionStateObserver::PresentationConnectionStateObserver(
-    MediaRouter* router,
-    const MediaRoute::Id& route_id)
-    : router_(router), route_id_(route_id) {
-  DCHECK(router_);
-  router_->RegisterPresentationConnectionStateObserver(this);
-}
-
-PresentationConnectionStateObserver::~PresentationConnectionStateObserver() {
-  router_->UnregisterPresentationConnectionStateObserver(this);
-}
-
-}  // namespace media_router