BodyStreamBuffer should release WebDataConsumerHandle::Reader eagerly

third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.h

 // Copyright 2014 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 BodyStreamBuffer_h
 #define BodyStreamBuffer_h
 
 #include "core/dom/DOMException.h"
 #include "core/streams/ReadableByteStream.h"
 #include "core/streams/ReadableByteStreamReader.h"
 #include "core/streams/UnderlyingSource.h"
 #include "modules/ModulesExport.h"
 #include "modules/fetch/FetchDataConsumerHandle.h"
 #include "modules/fetch/FetchDataLoader.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebDataConsumerHandle.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class EncodedFormData;
 class ExecutionContext;
 
 class MODULES_EXPORT BodyStreamBuffer final : public GarbageCollectedFinalized<BodyStreamBuffer>, public UnderlyingSource, public WebDataConsumerHandle::Client {
     WTF_MAKE_NONCOPYABLE(BodyStreamBuffer);
     USING_GARBAGE_COLLECTED_MIXIN(BodyStreamBuffer);
+    // Needed because we have to release |m_reader| promptly.
+    EAGERLY_FINALIZE();
 public:
     // |handle| cannot be null and cannot be locked.
     explicit BodyStreamBuffer(PassOwnPtr<FetchDataConsumerHandle> /* handle */);
 
     ReadableByteStream* stream() { return m_stream; }
 
     // Callable only when not locked.
     PassRefPtr<BlobDataHandle> drainAsBlobDataHandle(FetchDataConsumerHandle::Reader::BlobSizePolicy);
     PassRefPtr<EncodedFormData> drainAsFormData();
     void startLoading(ExecutionContext*, FetchDataLoader*, FetchDataLoader::Client* /* client */);
@@ skipping 34 matching lines @@
     OwnPtr<FetchDataConsumerHandle::Reader> m_reader;
     Member<ReadableByteStream> m_stream;
     // We need this member to keep it alive while loading.
     Member<FetchDataLoader> m_loader;
     bool m_streamNeedsMore;
 };
 
 } // namespace blink
 
 #endif // BodyStreamBuffer_h