Standardize usage of virtual/override/final in content/browser/

content/browser/appcache/chrome_appcache_service_unittest.cc

Index: content/browser/appcache/chrome_appcache_service_unittest.cc
diff --git a/content/browser/appcache/chrome_appcache_service_unittest.cc b/content/browser/appcache/chrome_appcache_service_unittest.cc
index e9723bd67c45c651ed105df28b2ee8aa69732bdb..450bfe2c49ece05d1a38cb56c0de72237622bf56 100644
--- a/content/browser/appcache/chrome_appcache_service_unittest.cc
+++ b/content/browser/appcache/chrome_appcache_service_unittest.cc
@@ -39,17 +39,15 @@ class MockURLRequestContextGetter : public net::URLRequestContextGetter {
       : context_(context), message_loop_proxy_(message_loop_proxy) {
   }
 
-  virtual net::URLRequestContext* GetURLRequestContext() override {
-    return context_;
-  }
+  net::URLRequestContext* GetURLRequestContext() override { return context_; }
 
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
-      GetNetworkTaskRunner() const override {
+  scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
+      const override {
     return message_loop_proxy_;
   }
 
  protected:
-  virtual ~MockURLRequestContextGetter() {}
+  ~MockURLRequestContextGetter() override {}
 
  private:
   net::URLRequestContext* context_;