Standardize usage of virtual/override/final specifiers.

extensions/browser/api_unittest.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_API_UNITTEST_H_
 #define EXTENSIONS_BROWSER_API_UNITTEST_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 19 matching lines @@
 
 // Use this class to enable calling API functions in a unittest.
 // By default, this class will create and load an empty unpacked |extension_|,
 // which will be used in all API function calls. This extension can be
 // overridden using set_extension().
 // When calling RunFunction[AndReturn*], |args| should be in JSON format,
 // wrapped in a list. See also RunFunction* in api_test_utils.h.
 class ApiUnitTest : public ExtensionsTest {
  public:
   ApiUnitTest();
-  virtual ~ApiUnitTest();
+  ~ApiUnitTest() override;
 
   const Extension* extension() const { return extension_.get(); }
   scoped_refptr<Extension> extension_ref() { return extension_; }
   void set_extension(scoped_refptr<Extension> extension) {
     extension_ = extension;
   }
 
  protected:
   // SetUp creates and loads an empty, unpacked Extension.
-  virtual void SetUp() override;
+  void SetUp() override;
 
   // Various ways of running an API function. These methods take ownership of
   // |function|. |args| should be in JSON format, wrapped in a list.
   // See also the RunFunction* methods in extension_function_test_utils.h.
 
   // Return the function result as a base::Value.
   scoped_ptr<base::Value> RunFunctionAndReturnValue(
       UIThreadExtensionFunction* function,
       const std::string& args);
 
@@ skipping 26 matching lines @@
 
   MockExtensionSystemFactory<MockExtensionSystem> extension_system_factory_;
 
   // The Extension used when running API function calls.
   scoped_refptr<Extension> extension_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_UNITTEST_H_