Remove BytesConsumer::read

third_party/WebKit/Source/modules/fetch/BytesConsumerForDataConsumerHandle.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/BytesConsumerForDataConsumerHandle.h"
 
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/Functional.h"
 
 #include <algorithm>
 #include <string.h>
 
 namespace blink {
 
 BytesConsumerForDataConsumerHandle::BytesConsumerForDataConsumerHandle(ExecutionContext* executionContext, std::unique_ptr<FetchDataConsumerHandle> handle)
     : m_executionContext(executionContext)
     , m_reader(handle->obtainFetchDataReader(this))
 {
 }
 
 BytesConsumerForDataConsumerHandle::~BytesConsumerForDataConsumerHandle()
 {
 }
 
-BytesConsumer::Result BytesConsumerForDataConsumerHandle::read(char* buffer, size_t size, size_t* readSize)
-{
-    DCHECK(!m_isInTwoPhaseRead);
-    *readSize = 0;
-    if (m_state == InternalState::Closed)
-        return Result::Done;
-    if (m_state == InternalState::Errored)
-        return Result::Error;
-
-    WebDataConsumerHandle::Result r = m_reader->read(buffer, size, WebDataConsumerHandle::FlagNone, readSize);
-    switch (r) {
-    case WebDataConsumerHandle::Ok:
-        return Result::Ok;
-    case WebDataConsumerHandle::ShouldWait:
-        return Result::ShouldWait;
-    case WebDataConsumerHandle::Done:
-        close();
-        return Result::Done;
-    case WebDataConsumerHandle::Busy:
-    case WebDataConsumerHandle::ResourceExhausted:
-    case WebDataConsumerHandle::UnexpectedError:
-        error();
-        return Result::Error;
-    }
-    NOTREACHED();
-    return Result::Error;
-}
-
 BytesConsumer::Result BytesConsumerForDataConsumerHandle::beginRead(const char** buffer, size_t* available)
 {
     DCHECK(!m_isInTwoPhaseRead);
     *buffer = nullptr;
     *available = 0;
     if (m_state == InternalState::Closed)
         return Result::Done;
     if (m_state == InternalState::Errored)
         return Result::Error;
 
@@ skipping 157 matching lines @@
 }
 
 void BytesConsumerForDataConsumerHandle::notify()
 {
     if (m_state == InternalState::Closed || m_state == InternalState::Errored)
         return;
     didGetReadable();
 }
 
 } // namespace blink