[Media Router] Add UMA histograms tracking component extension version/wakeups

chrome/browser/media/router/media_router_mojo_test.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_TEST_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_MOJO_TEST_H_
 
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/media/router/media_router_mojo_impl.h"
 #include "chrome/browser/media/router/mock_media_router.h"
 #include "chrome/browser/media/router/test_helper.h"
 #include "chrome/test/base/testing_profile.h"
+#include "extensions/common/extension.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media_router {
 
 class MediaRouterMojoImpl;
 class MessagePump;
 
 // Tests the API call flow between the MediaRouterMojoImpl and the Media Router
 // Mojo service in both directions.
 class MediaRouterMojoTest : public ::testing::Test {
  public:
   MediaRouterMojoTest();
   ~MediaRouterMojoTest() override;
 
  protected:
   void SetUp() override;
 
   void ProcessEventLoop();
 
   void ConnectProviderManagerService();
 
-  const std::string& extension_id() const { return extension_id_; }
+  const std::string& extension_id() const { return extension_->id(); }
 
   MediaRouterMojoImpl* router() const { return mock_media_router_.get(); }
 
   // Mock objects.
   MockMediaRouteProvider mock_media_route_provider_;
   testing::NiceMock<MockEventPageTracker> mock_event_page_tracker_;
 
   // Mojo proxy object for |mock_media_router_|
   media_router::interfaces::MediaRouterPtr media_router_proxy_;
 
  private:
-  std::string extension_id_;
+  scoped_refptr<extensions::Extension> extension_;
   scoped_ptr<MediaRouterMojoImpl> mock_media_router_;
   scoped_ptr<mojo::Binding<interfaces::MediaRouteProvider>> binding_;
   base::MessageLoop message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoTest);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_MOJO_TEST_H_