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

chrome/browser/renderer_host/pepper/pepper_talk_host.h

Index: chrome/browser/renderer_host/pepper/pepper_talk_host.h
diff --git a/chrome/browser/renderer_host/pepper/pepper_talk_host.h b/chrome/browser/renderer_host/pepper/pepper_talk_host.h
index a61a323f7c4a8f98634fd7f9a9af02ed60c9bd44..9a71788e0a27a3e6bf89cd05ed66139768da9c65 100644
--- a/chrome/browser/renderer_host/pepper/pepper_talk_host.h
+++ b/chrome/browser/renderer_host/pepper/pepper_talk_host.h
@@ -27,11 +27,11 @@ class PepperTalkHost : public ppapi::host::ResourceHost {
   PepperTalkHost(content::BrowserPpapiHost* host,
                  PP_Instance instance,
                  PP_Resource resource);
-  virtual ~PepperTalkHost();
+  ~PepperTalkHost() override;
 
  private:
   // ResourceHost override.
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;