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

content/renderer/input/input_event_filter_unittest.cc

Index: content/renderer/input/input_event_filter_unittest.cc
diff --git a/content/renderer/input/input_event_filter_unittest.cc b/content/renderer/input/input_event_filter_unittest.cc
index 34f0fa9a8d6c480965bc5c890069f744bfa21fe1..ab6111d70b565e2fe639097b98cd903957242304 100644
--- a/content/renderer/input/input_event_filter_unittest.cc
+++ b/content/renderer/input/input_event_filter_unittest.cc
@@ -80,7 +80,7 @@ class InputEventRecorder {
 
 class IPCMessageRecorder : public IPC::Listener {
  public:
-  virtual bool OnMessageReceived(const IPC::Message& message) override {
+  bool OnMessageReceived(const IPC::Message& message) override {
     messages_.push_back(message);
     return true;
   }