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

chrome/browser/ui/search/instant_page.h

Index: chrome/browser/ui/search/instant_page.h
diff --git a/chrome/browser/ui/search/instant_page.h b/chrome/browser/ui/search/instant_page.h
index cada7626bfb213ac7ef8c88d1b2db966208e1340..e3cc6bbc729e5ad8ee65e6aafa655e500ed02e60 100644
--- a/chrome/browser/ui/search/instant_page.h
+++ b/chrome/browser/ui/search/instant_page.h
@@ -54,7 +54,7 @@ class InstantPage : public content::WebContentsObserver,
     virtual ~Delegate();
   };
 
-  virtual ~InstantPage();
+  ~InstantPage() override;
 
   // Returns the Instant URL that was loaded for this page. Returns the empty
   // string if no URL was explicitly loaded as is the case for InstantTab.
@@ -99,14 +99,14 @@ class InstantPage : public content::WebContentsObserver,
   FRIEND_TEST_ALL_PREFIXES(InstantPageTest, PageSupportsInstant);
 
   // Overridden from content::WebContentsObserver:
-  virtual void DidCommitProvisionalLoadForFrame(
+  void DidCommitProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& url,
       ui::PageTransition transition_type) override;
 
   // Overridden from SearchModelObserver:
-  virtual void ModelChanged(const SearchModel::State& old_state,
-                            const SearchModel::State& new_state) override;
+  void ModelChanged(const SearchModel::State& old_state,
+                    const SearchModel::State& new_state) override;
 
   // Update the status of Instant support.
   void InstantSupportDetermined(bool supports_instant);