Implement an observer for the component updater.

chrome/browser/component_updater/test/component_updater_service_unittest.h

 // Copyright 2013 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_COMPONENT_UPDATER_TEST_COMPONENT_UPDATER_SERVICE_UNITTEST_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_TEST_COMPONENT_UPDATER_SERVICE_UNITTEST_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 140 matching lines @@
  private:
   TestConfigurator* test_config_;
   base::FilePath test_data_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<ComponentUpdateService> component_updater_;
 };
 
 const char expected_crx_url[] =
     "http://localhost/download/jebgalgnebhfojomionfpkfelancnnkf.crx";
 
-class MockComponentObserver : public ComponentObserver {
+class MockServiceObserver : public ServiceObserver {
  public:
-  MockComponentObserver();
-  ~MockComponentObserver();
-  MOCK_METHOD2(OnEvent, void(Events event, int extra));
+  MockServiceObserver();
+  ~MockServiceObserver();
+  MOCK_METHOD2(OnEvent, void(Events event, const std::string&));
 };
 
 class OnDemandTester {
  public:
   static ComponentUpdateService::Status OnDemand(
       ComponentUpdateService* cus, const std::string& component_id);
 };
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_TEST_COMPONENT_UPDATER_SERVICE_UNITTEST_H_