Standardize usage of virtual/override/final specifiers.

chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc

Index: chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc
diff --git a/chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc b/chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc
index 4ca5b9986b174a0f7d9b887b7ee59f67262fa673..13c1a7856fc26c2769ab18032d444d60c8eb7206 100644
--- a/chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc
+++ b/chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc
@@ -23,13 +23,13 @@ class BrowsingDataChannelIDHelperTest
   BrowsingDataChannelIDHelperTest() : ssl_config_changed_count_(0) {
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     testing_profile_.reset(new TestingProfile());
 
     testing_profile_->GetSSLConfigService()->AddObserver(this);
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     testing_profile_->GetSSLConfigService()->RemoveObserver(this);
   }