[Media Router] Implement an internal Media Routes observer.

chrome/browser/media/router/mojo/media_router_mojo_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 95 matching lines @@
   }
 
   void set_instance_id_for_test(const std::string& instance_id) {
     instance_id_ = instance_id;
   }
 
  private:
   friend class MediaRouterFactory;
   friend class MediaRouterMojoExtensionTest;
   friend class MediaRouterMojoTest;
+  FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest, JoinRoute);
+  FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest, JoinRouteTimedOutFails);
+  FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
+                           JoinRouteOffTheRecordMismatchFails);
+  FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
+                           OffTheRecordRoutesTerminatedOnProfileShutdown);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
                            RegisterAndUnregisterMediaSinksObserver);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
                            RegisterMediaSinksObserverWithAvailabilityChange);
   FRIEND_TEST_ALL_PREFIXES(
       MediaRouterMojoImplTest,
       RegisterAndUnregisterMediaSinksObserverWithAvailabilityChange);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest,
                            RegisterAndUnregisterMediaRoutesObserver);
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoImplTest, HandleIssue);
@@ skipping 289 matching lines @@
 #endif
 
   base::WeakPtrFactory<MediaRouterMojoImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_