Removed usage of RefPtr::Release in unit tests

third_party/WebKit/Source/modules/fetch/FormDataBytesConsumerTest.cpp

 // Copyright 2016 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 "modules/fetch/FormDataBytesConsumer.h"
 
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/dom/Document.h"
 #include "core/html/FormData.h"
@@ skipping 30 matching lines @@
   data->AppendFileSystemURLRange(KURL(KURL(), "file:///foo/bar/baz"), 6, 7, 8);
   std::unique_ptr<BlobData> blob_data = BlobData::Create();
   blob_data->AppendText("hello", false);
   auto size = blob_data->length();
   RefPtr<BlobDataHandle> blob_data_handle =
       BlobDataHandle::Create(std::move(blob_data), size);
   data->AppendBlob(blob_data_handle->Uuid(), blob_data_handle);
   Vector<char> boundary;
   boundary.Append("\0", 1);
   data->SetBoundary(boundary);
-  return data.Release();
+  return data;
 }
 
 class NoopClient final : public GarbageCollectedFinalized<NoopClient>,
                          public BytesConsumer::Client {
   USING_GARBAGE_COLLECTED_MIXIN(NoopClient);
 
  public:
   void OnStateChange() override {}
 };
 
@@ skipping 314 matching lines @@
   EXPECT_CALL(*underlying, Cancel());
   EXPECT_CALL(checkpoint, Call(2));
 
   checkpoint.Call(1);
   consumer->Cancel();
   checkpoint.Call(2);
 }
 
 }  // namespace
 }  // namespace blink