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

chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc

Index: chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc
diff --git a/chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc b/chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc
index a40f85a9d48e05ff30ecf2b11edd77df23fa1a9d..ba49ca9815834a9c8b12ace0cc3baded044b2700 100644
--- a/chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc
+++ b/chrome/browser/extensions/api/mdns/dns_sd_registry_unittest.cc
@@ -13,15 +13,15 @@ namespace extensions {
 class MockDnsSdDeviceLister : public DnsSdDeviceLister {
  public:
   MockDnsSdDeviceLister() : DnsSdDeviceLister(NULL, NULL, "") {}
-  virtual ~MockDnsSdDeviceLister() {}
+  ~MockDnsSdDeviceLister() override {}
 
-  virtual void Discover(bool force_update) override {}
+  void Discover(bool force_update) override {}
 };
 
 class TestDnsSdRegistry : public DnsSdRegistry {
  public:
   TestDnsSdRegistry() : DnsSdRegistry(NULL), delegate_(NULL) {}
-  virtual ~TestDnsSdRegistry() {}
+  ~TestDnsSdRegistry() override {}
 
   MockDnsSdDeviceLister* GetListerForService(const std::string& service_type) {
     return listers_[service_type];
@@ -39,11 +39,11 @@ class TestDnsSdRegistry : public DnsSdRegistry {
   }
 
  protected:
-  virtual DnsSdDeviceLister* CreateDnsSdDeviceLister(
+  DnsSdDeviceLister* CreateDnsSdDeviceLister(
       DnsSdDelegate* delegate,
       const std::string& service_type,
       local_discovery::ServiceDiscoverySharedClient* discovery_client)
-          override {
+      override {
     delegate_ = delegate;
     MockDnsSdDeviceLister* lister = new MockDnsSdDeviceLister();
     listers_[service_type] = lister;