Switch to using scoped_ptr with UserData

content/public/browser/browser_context.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 127 matching lines @@
   // BrowserContext initializs the corresponding getters when its objects are
   // created, but if the embedder wants to pass the ResourceContext to another
   // thread before they use BrowserContext, they should call this to make sure
   // that the ResourceContext is ready.
   static void EnsureResourceContextInitialized(BrowserContext* browser_context);
 
   // Tells the HTML5 objects on this context to persist their session state
   // across the next restart.
   static void SaveSessionState(BrowserContext* browser_context);
 
-  static void SetDownloadManagerForTesting(BrowserContext* browser_context,
-                                           DownloadManager* download_manager);
+  static void SetDownloadManagerForTesting(
+      BrowserContext* browser_context,
+      std::unique_ptr<content::DownloadManager> download_manager);
 
   // Makes the Service Manager aware of this BrowserContext, and assigns a user
   // ID number to it. Should be called for each BrowserContext created.
   static void Initialize(BrowserContext* browser_context,
                          const base::FilePath& path);
 
   // Returns a Service User ID associated with this BrowserContext. This ID is
   // not persistent across runs. See
   // services/service_manager/public/interfaces/connector.mojom. By default,
   // this user id is randomly generated when Initialize() is called.
@@ skipping 104 matching lines @@
   // 2) The embedder saves its salt across restarts.
   static std::string CreateRandomMediaDeviceIDSalt();
 
  private:
   const std::string media_device_id_salt_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_