Standardize usage of virtual/override/final in chrome/renderer/

chrome/renderer/net_benchmarking_extension.cc

Index: chrome/renderer/net_benchmarking_extension.cc
diff --git a/chrome/renderer/net_benchmarking_extension.cc b/chrome/renderer/net_benchmarking_extension.cc
index 61abbff494db8b6bceb4a41fd6929dda5cc675b5..cf8224f41bc142e07b5110f90efcbf5f7fa43308 100644
--- a/chrome/renderer/net_benchmarking_extension.cc
+++ b/chrome/renderer/net_benchmarking_extension.cc
@@ -43,7 +43,7 @@ class NetBenchmarkingWrapper : public v8::Extension {
         "};"
         ) {}
 
-  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
+  v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
       v8::Isolate* isolate,
       v8::Handle<v8::String> name) override {
     if (name->Equals(v8::String::NewFromUtf8(isolate, "ClearCache"))) {