[Fetch API] Add streams predicates to BodyStreamBuffer

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 "modules/fetch/Response.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
@@ skipping 390 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();
+    return internalBodyBuffer() && internalBodyBuffer()->isStreamDisturbed();
 }
 
 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