Implement GetBrowsingDataRemoverDelegate() for BrowserContext subclasses

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 217 matching lines @@
   // Returns the PermissionManager associated with that context if any, nullptr
   // otherwise.
   virtual PermissionManager* GetPermissionManager() = 0;
 
   // Returns the BackgroundSyncController associated with that context if any,
   // nullptr otherwise.
   virtual BackgroundSyncController* GetBackgroundSyncController() = 0;
 
   // Returns the BrowsingDataRemoverDelegate for this context. This will be
   // called once per context. It's valid to return nullptr.
-  virtual BrowsingDataRemoverDelegate* GetBrowsingDataRemoverDelegate();
+  virtual BrowsingDataRemoverDelegate* GetBrowsingDataRemoverDelegate() = 0;
 
   // Creates the main net::URLRequestContextGetter. It's called only once.
   virtual net::URLRequestContextGetter* CreateRequestContext(
       ProtocolHandlerMap* protocol_handlers,
       URLRequestInterceptorScopedVector request_interceptors) = 0;
 
   // Creates the net::URLRequestContextGetter for a StoragePartition. It's
   // called only once per partition_path.
   virtual net::URLRequestContextGetter* CreateRequestContextForStoragePartition(
       const base::FilePath& partition_path,
@@ skipping 27 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_