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

chrome/browser/predictors/resource_prefetcher_manager.h

Index: chrome/browser/predictors/resource_prefetcher_manager.h
diff --git a/chrome/browser/predictors/resource_prefetcher_manager.h b/chrome/browser/predictors/resource_prefetcher_manager.h
index 1a6ff7b7f6461e80a5e2bc753c3ea1a2c8831389..335051ec42cc5ca7660148d7ac1760a07524fa80 100644
--- a/chrome/browser/predictors/resource_prefetcher_manager.h
+++ b/chrome/browser/predictors/resource_prefetcher_manager.h
@@ -54,10 +54,10 @@ class ResourcePrefetcherManager
   void MaybeRemovePrefetch(const NavigationID& navigation_id);
 
   // ResourcePrefetcher::Delegate methods.
-  virtual void ResourcePrefetcherFinished(
+  void ResourcePrefetcherFinished(
       ResourcePrefetcher* prefetcher,
       ResourcePrefetcher::RequestVector* requests) override;
-  virtual net::URLRequestContext* GetURLRequestContext() override;
+  net::URLRequestContext* GetURLRequestContext() override;
 
  private:
   friend class base::RefCountedThreadSafe<ResourcePrefetcherManager>;
@@ -65,7 +65,7 @@ class ResourcePrefetcherManager
 
   typedef std::map<std::string, ResourcePrefetcher*> PrefetcherMap;
 
-  virtual ~ResourcePrefetcherManager();
+  ~ResourcePrefetcherManager() override;
 
   // UI Thread. |predictor_| needs to be called on the UI thread.
   void ResourcePrefetcherFinishedOnUI(