Remove create[Done|UnexpectedError]DataConsumerHandle

third_party/WebKit/Source/modules/fetch/DataConsumerHandleUtil.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 DataConsumerHandleUtil_h
 #define DataConsumerHandleUtil_h
 
 #include "modules/ModulesExport.h"
 #include "modules/fetch/FetchDataConsumerHandle.h"
 #include "public/platform/WebDataConsumerHandle.h"
-#include "wtf/Allocator.h"
-#include "wtf/WeakPtr.h"
 #include <memory>
 
 namespace blink {
 
 // Returns a handle that returns ShouldWait for read / beginRead and
 // UnexpectedError for endRead.
 MODULES_EXPORT std::unique_ptr<WebDataConsumerHandle>
 createWaitingDataConsumerHandle();
 
-// Returns a handle that returns Done for read / beginRead and
-// UnexpectedError for endRead.
-MODULES_EXPORT std::unique_ptr<WebDataConsumerHandle>
-createDoneDataConsumerHandle();
-
-// Returns a handle that returns UnexpectedError for read / beginRead /
-// endRead.
-MODULES_EXPORT std::unique_ptr<WebDataConsumerHandle>
-createUnexpectedErrorDataConsumerHandle();
-
 // Returns a FetchDataConsumerHandle that wraps WebDataConsumerHandle.
 MODULES_EXPORT std::unique_ptr<FetchDataConsumerHandle>
     createFetchDataConsumerHandleFromWebHandle(
         std::unique_ptr<WebDataConsumerHandle>);
 
-// A helper class to call Client::didGetReadable() asynchronously after
-// Reader creation.
-// NotifyOnReaderCreationHelper must be owned by a reader and
-// |client| must be the client of the reader.
-class NotifyOnReaderCreationHelper final {
-  DISALLOW_NEW();
-
- public:
-  NotifyOnReaderCreationHelper(WebDataConsumerHandle::Client* /* client */);
-
- private:
-  void notify(WebDataConsumerHandle::Client*);
-
-  WeakPtrFactory<NotifyOnReaderCreationHelper> m_factory;
-};
-
 }  // namespace blink
 
 #endif  // DataConsumerHandleUtil_h