Standardize usage of virtual/override/final in components/

components/invalidation/sync_system_resources_unittest.cc

Index: components/invalidation/sync_system_resources_unittest.cc
diff --git a/components/invalidation/sync_system_resources_unittest.cc b/components/invalidation/sync_system_resources_unittest.cc
index 0956b3430d2aba03d739df4263207b0205640c24..ea2fb52e43bdf46c0faacae6c36c84faece786fd 100644
--- a/components/invalidation/sync_system_resources_unittest.cc
+++ b/components/invalidation/sync_system_resources_unittest.cc
@@ -179,24 +179,20 @@ TEST_F(SyncSystemResourcesTest, WriteState) {
 class TestSyncNetworkChannel : public SyncNetworkChannel {
  public:
   TestSyncNetworkChannel() {}
-  virtual ~TestSyncNetworkChannel() {}
+  ~TestSyncNetworkChannel() override {}
 
   using SyncNetworkChannel::NotifyNetworkStatusChange;
   using SyncNetworkChannel::NotifyChannelStateChange;
   using SyncNetworkChannel::DeliverIncomingMessage;
 
-  virtual void SendMessage(const std::string& message) override {
-  }
+  void SendMessage(const std::string& message) override {}
 
-  virtual void UpdateCredentials(const std::string& email,
-      const std::string& token) override {
-  }
+  void UpdateCredentials(const std::string& email,
+                         const std::string& token) override {}
 
-  virtual int GetInvalidationClientType() override {
-    return 0;
-  }
+  int GetInvalidationClientType() override { return 0; }
 
-  virtual void RequestDetailedStatus(
+  void RequestDetailedStatus(
       base::Callback<void(const base::DictionaryValue&)> callback) override {
     base::DictionaryValue value;
     callback.Run(value);
@@ -220,7 +216,7 @@ class SyncNetworkChannelTest
     network_channel_.RemoveObserver(this);
   }
 
-  virtual void OnNetworkChannelStateChanged(
+  void OnNetworkChannelStateChanged(
       InvalidatorState invalidator_state) override {
     last_invalidator_state_ = invalidator_state;
   }