Convert //extensions/browser/api from scoped_ptr to std::unique_ptr

extensions/browser/api/virtual_keyboard_private/virtual_keyboard_private_api.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_VIRTUAL_KEYBOARD_PRIVATE_VIRTUAL_KEYBOARD_PRIVATE_API_H_
 #define EXTENSIONS_BROWSER_API_VIRTUAL_KEYBOARD_PRIVATE_VIRTUAL_KEYBOARD_PRIVATE_API_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_function.h"
@@ skipping 147 matching lines @@
 
  private:
   friend class BrowserContextKeyedAPIFactory<VirtualKeyboardAPI>;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() { return "VirtualKeyboardAPI"; }
 
   // Require accces to delegate while incognito or during login.
   static const bool kServiceHasOwnInstanceInIncognito = true;
 
-  scoped_ptr<VirtualKeyboardDelegate> delegate_;
+  std::unique_ptr<VirtualKeyboardDelegate> delegate_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_VIRTUAL_KEYBOARD_PRIVATE_VIRTUAL_KEYBOARD_PRIVATE_API_H_