Standardize usage of virtual/override/final specifiers.

chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc

Index: chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc
diff --git a/chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc b/chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc
index 8fae64fbd047f9150cf6aed0c07e2eb0c87cf73c..3cb9046b77aae8f5ad4bd4da315498a69cad9e16 100644
--- a/chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc
+++ b/chrome/browser/invalidation/gcm_invalidation_bridge_unittest.cc
@@ -48,9 +48,9 @@ class GCMInvalidationBridgeTest : public ::testing::Test {
   GCMInvalidationBridgeTest()
       : connection_online_(false) {}
 
-  virtual ~GCMInvalidationBridgeTest() {}
+  ~GCMInvalidationBridgeTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     TestingProfile::Builder builder;
     builder.AddTestingFactory(ProfileOAuth2TokenServiceFactory::GetInstance(),
                               &BuildAutoIssuingFakeProfileOAuth2TokenService);