Standardize usage of virtual/override/final in content/

content/public/test/test_browser_context.cc

Index: content/public/test/test_browser_context.cc
diff --git a/content/public/test/test_browser_context.cc b/content/public/test/test_browser_context.cc
index 8d7c5771e3c7dc20debbaf3ffcd5493c05821992..2aab98354d2bb38e81b77cddf1d47a87cc651aff 100644
--- a/content/public/test/test_browser_context.cc
+++ b/content/public/test/test_browser_context.cc
@@ -21,17 +21,15 @@ class TestContextURLRequestContextGetter : public net::URLRequestContextGetter {
       : null_task_runner_(new base::NullTaskRunner) {
   }
 
-  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 null_task_runner_;
   }
 
  private:
-  virtual ~TestContextURLRequestContextGetter() {}
+  ~TestContextURLRequestContextGetter() override {}
 
   net::TestURLRequestContext context_;
   scoped_refptr<base::SingleThreadTaskRunner> null_task_runner_;