Convert //tools to use std::unique_ptr

chrome/browser/extensions/api/experience_sampling_private/experience_sampling.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 CHROME_BROWSER_EXTENSIONS_API_EXPERIENCE_SAMPLING_PRIVATE_EXPERIENCE_SAMPLING_H_
 #define CHROME_BROWSER_EXTENSIONS_API_EXPERIENCE_SAMPLING_PRIVATE_EXPERIENCE_SAMPLING_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "chrome/common/extensions/api/experience_sampling_private.h"
 
 namespace content {
 class BrowserContext;
 }
 
 class GURL;
 
 namespace extensions {
 
@@ skipping 49 matching lines @@
   bool has_viewed_learn_more_;
   content::BrowserContext* browser_context_;
   UIElement ui_element_;
 
   DISALLOW_COPY_AND_ASSIGN(ExperienceSamplingEvent);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_EXPERIENCE_SAMPLING_PRIVATE_EXPERIENCE_SAMPLING_H_