Add Streams API support to XMLHttpRequest

Source/core/fileapi/Stream.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 44 matching lines @@
     buffer->mutableData()->resize(len);
     memcpy(buffer->mutableData()->data(), data, len);
     BlobRegistry::addDataToStream(m_internalURL, buffer);
 }
 
 void Stream::finalize()
 {
     BlobRegistry::finalizeStream(m_internalURL);
 }
 
+void Stream::abort()
+{
+    BlobRegistry::abortStream(m_internalURL);
+}
+
 Stream::~Stream()
 {
     BlobRegistry::unregisterStreamURL(m_internalURL);
 }
 
 } // namespace WebCore