Update SupportsUserData uses with unique_ptr.

content/browser/blob_storage/chrome_blob_storage_context.cc

 // 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.
 
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 200 matching lines @@
     if (element.type() != ResourceRequestBodyImpl::Element::TYPE_BLOB)
       continue;
     std::unique_ptr<storage::BlobDataHandle> handle =
         blob_context->GetBlobDataFromUUID(element.blob_uuid());
     DCHECK(handle);
     if (!handle)
       continue;
     // Ensure the blob and any attached shareable files survive until
     // upload completion. The |body| takes ownership of |handle|.
     const void* key = handle.get();
-    body->SetUserData(key, handle.release());
+    body->SetUserData(key, std::move(handle));
   }
 }
 
 }  // namespace content