replace OVERRIDE and FINAL with override and final in extensions/

extensions/shell/browser/shell_extension_system_factory.h

Index: extensions/shell/browser/shell_extension_system_factory.h
diff --git a/extensions/shell/browser/shell_extension_system_factory.h b/extensions/shell/browser/shell_extension_system_factory.h
index 5d0a883aaa4591409adfe12fcdae30067b347cc0..516cec2bfbe60f3ac892a1ac4e0c4e534012af8a 100644
--- a/extensions/shell/browser/shell_extension_system_factory.h
+++ b/extensions/shell/browser/shell_extension_system_factory.h
@@ -15,7 +15,7 @@ class ShellExtensionSystemFactory : public ExtensionSystemProvider {
  public:
   // ExtensionSystemProvider implementation:
   virtual ExtensionSystem* GetForBrowserContext(
-      content::BrowserContext* context) OVERRIDE;
+      content::BrowserContext* context) override;
 
   static ShellExtensionSystemFactory* GetInstance();
 
@@ -27,10 +27,10 @@ class ShellExtensionSystemFactory : public ExtensionSystemProvider {
 
   // BrowserContextKeyedServiceFactory implementation:
   virtual KeyedService* BuildServiceInstanceFor(
-      content::BrowserContext* context) const OVERRIDE;
+      content::BrowserContext* context) const override;
   virtual content::BrowserContext* GetBrowserContextToUse(
-      content::BrowserContext* context) const OVERRIDE;
-  virtual bool ServiceIsCreatedWithBrowserContext() const OVERRIDE;
+      content::BrowserContext* context) const override;
+  virtual bool ServiceIsCreatedWithBrowserContext() const override;
 
   DISALLOW_COPY_AND_ASSIGN(ShellExtensionSystemFactory);
 };