[Fetch API] Reflect spec changes of bodyUsed property

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

 // 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.
 
 #include "config.h"
 #include "modules/fetch/Response.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/DOMArrayBuffer.h"
@@ skipping 372 matching lines @@
 }
 
 Response::Response(ExecutionContext* context, FetchResponseData* response, Headers* headers)
     : Body(context) , m_response(response) , m_headers(headers) {}
 
 bool Response::hasBody() const
 {
     return m_response->internalBuffer();
 }
 
+bool Response::bodyUsed()
+{
+    return (internalBodyBuffer() && internalBodyBuffer()->stream()->isDisturbed()) || (bodyBuffer() && bodyBuffer()->stream()->isDisturbed());

[tyoshino (SeeGerritForStatus), 2015/11/18 09:55:36]

just need to check internalBodyBuffer?

[yhirano, 2015/11/19 08:41:29]

Done.

+}
+
 String Response::mimeType() const
 {
     return m_response->mimeType();
 }
 
 String Response::internalMIMEType() const
 {
     return m_response->internalMIMEType();
 }
 
 DEFINE_TRACE(Response)
 {
     Body::trace(visitor);
     visitor->trace(m_response);
     visitor->trace(m_headers);
 }
 
 } // namespace blink