Remove stl_util's deletion function use from content/.

content/browser/background_sync/background_sync_context.h

 // Copyright 2015 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_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_CONTEXT_H_
 #define CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_CONTEXT_H_
 
+#include <map>
 #include <memory>
-#include <set>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/modules/background_sync/background_sync.mojom.h"
 
 namespace content {
 
 class BackgroundSyncManager;
 class BackgroundSyncServiceImpl;
@@ skipping 43 matching lines @@
       mojo::InterfaceRequest<blink::mojom::BackgroundSyncService> request);
 
   void ShutdownOnIO();
 
   // Only accessed on the IO thread.
   std::unique_ptr<BackgroundSyncManager> background_sync_manager_;
 
   // The services are owned by this. They're either deleted
   // during ShutdownOnIO or when the channel is closed via
   // ServiceHadConnectionError. Only accessed on the IO thread.
-  std::set<BackgroundSyncServiceImpl*> services_;
+  std::map<BackgroundSyncServiceImpl*,
+           std::unique_ptr<BackgroundSyncServiceImpl>>
+      services_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundSyncContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_CONTEXT_H_