Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/socket/socket_apitest.cc

Index: chrome/browser/extensions/api/socket/socket_apitest.cc
diff --git a/chrome/browser/extensions/api/socket/socket_apitest.cc b/chrome/browser/extensions/api/socket/socket_apitest.cc
index 60f50b26466305bdf1649443b2cbc59652fe58f2..9ffb23117adf01c087a4ce8e20d7fd0ebd724d63 100644
--- a/chrome/browser/extensions/api/socket/socket_apitest.cc
+++ b/chrome/browser/extensions/api/socket/socket_apitest.cc
@@ -33,12 +33,12 @@ class SocketApiTest : public ExtensionApiTest {
                         new extensions::MockHostResolverCreator()) {
   }
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     extensions::HostResolverWrapper::GetInstance()->SetHostResolverForTesting(
         resolver_creator_->CreateMockHostResolver());
   }
 
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     extensions::HostResolverWrapper::GetInstance()->
         SetHostResolverForTesting(NULL);
     resolver_creator_->DeleteMockHostResolver();