Reflect the current state in Media Router Action icon.

chrome/browser/media/router/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_MEDIA_ROUTER_MOJO_IMPL_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_MOJO_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/media/router/issue.h"
 #include "chrome/browser/media/router/issue_manager.h"
 #include "chrome/browser/media/router/media_router.h"
 #include "chrome/browser/media/router/media_router.mojom.h"
 
+class TestMediaRouterAction;
+
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 class EventPageTracker;
 }
 
 namespace media_router {
 
@@ skipping 56 matching lines @@
     return media_route_provider_extension_id_;
   }
 
   void set_instance_id_for_test(const std::string& instance_id) {
     instance_id_ = instance_id;
   }
 
  private:
   friend class MediaRouterFactory;
   friend class MediaRouterMojoTest;
+  friend class ::TestMediaRouterAction;

[Kevin M, 2015/08/03 17:15:37]

Is the :: needed here?

[apacible, 2015/08/03 20:47:22]

Yes, this is to specify TestMediaRouterAction isn't declared in a namespace,
whereas MediaRouterMojoImpl is in media_router namespace.

 
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoExtensionTest,
                            DeferredBindingAndSuspension);
 
   // Standard constructor, used by
   // MediaRouterMojoImplFactory::GetApiForBrowserContext.
   explicit MediaRouterMojoImpl(
       extensions::EventPageTracker* event_page_tracker);
 
   // Binds |this| to a Mojo interface request, so that clients can acquire a
@@ skipping 97 matching lines @@
   std::string instance_id_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_MOJO_IMPL_H_