Standardize usage of virtual/override/final specifiers in google_apis/.

google_apis/gaia/account_tracker_unittest.cc

Index: google_apis/gaia/account_tracker_unittest.cc
diff --git a/google_apis/gaia/account_tracker_unittest.cc b/google_apis/gaia/account_tracker_unittest.cc
index f3792a713cd16fef63bfdca8a28d2a097b442219..532ed355595e8f640fbe8c6aece4518f5c58ef52 100644
--- a/google_apis/gaia/account_tracker_unittest.cc
+++ b/google_apis/gaia/account_tracker_unittest.cc
@@ -264,10 +264,9 @@ class IdentityAccountTrackerTest : public testing::Test {
  public:
   IdentityAccountTrackerTest() {}
 
-  virtual ~IdentityAccountTrackerTest() {}
-
-  virtual void SetUp() override {
+  ~IdentityAccountTrackerTest() override {}
 
+  void SetUp() override {
     fake_oauth2_token_service_.reset(new FakeOAuth2TokenService());
 
     fake_identity_provider_.reset(
@@ -280,7 +279,7 @@ class IdentityAccountTrackerTest : public testing::Test {
     account_tracker_->AddObserver(&observer_);
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     account_tracker_->RemoveObserver(&observer_);
     account_tracker_->Shutdown();
   }