Standardize usage of virtual/override/final in components/

components/gcm_driver/gcm_account_mapper_unittest.cc

Index: components/gcm_driver/gcm_account_mapper_unittest.cc
diff --git a/components/gcm_driver/gcm_account_mapper_unittest.cc b/components/gcm_driver/gcm_account_mapper_unittest.cc
index bf8fdf0d159c03f02aa409a1d3a287d11d26ba08..b714e924d76cd0796b18ae639e2431a1e7833d54 100644
--- a/components/gcm_driver/gcm_account_mapper_unittest.cc
+++ b/components/gcm_driver/gcm_account_mapper_unittest.cc
@@ -78,17 +78,15 @@ class CustomFakeGCMDriver : public FakeGCMDriver {
   };
 
   CustomFakeGCMDriver();
-  virtual ~CustomFakeGCMDriver();
-
-  virtual void UpdateAccountMapping(
-      const AccountMapping& account_mapping) override;
-  virtual void RemoveAccountMapping(const std::string& account_id) override;
-  virtual void AddAppHandler(const std::string& app_id,
-                             GCMAppHandler* handler) override;
-  virtual void RemoveAppHandler(const std::string& app_id) override;
-  virtual void RegisterImpl(
-      const std::string& app_id,
-      const std::vector<std::string>& sender_ids) override;
+  ~CustomFakeGCMDriver() override;
+
+  void UpdateAccountMapping(const AccountMapping& account_mapping) override;
+  void RemoveAccountMapping(const std::string& account_id) override;
+  void AddAppHandler(const std::string& app_id,
+                     GCMAppHandler* handler) override;
+  void RemoveAppHandler(const std::string& app_id) override;
+  void RegisterImpl(const std::string& app_id,
+                    const std::vector<std::string>& sender_ids) override;
 
   void CompleteRegister(const std::string& registration_id,
                         GCMClient::Result result);
@@ -114,9 +112,9 @@ class CustomFakeGCMDriver : public FakeGCMDriver {
   bool registration_id_requested() const { return registration_id_requested_; }
 
  protected:
-  virtual void SendImpl(const std::string& app_id,
-                        const std::string& receiver_id,
-                        const GCMClient::OutgoingMessage& message) override;
+  void SendImpl(const std::string& app_id,
+                const std::string& receiver_id,
+                const GCMClient::OutgoingMessage& message) override;
 
  private:
   AccountMapping account_mapping_;