Add Streams API support to XMLHttpRequest

Source/core/fileapi/Stream.cpp

Index: Source/core/fileapi/Stream.cpp
diff --git a/Source/core/fileapi/Stream.cpp b/Source/core/fileapi/Stream.cpp
index 9dab48ef7e54ced76fa048042d42d3b197f63ca0..da28e23a534ff7d9a5d3add96e0f18e63e7657b7 100644
--- a/Source/core/fileapi/Stream.cpp
+++ b/Source/core/fileapi/Stream.cpp
@@ -62,6 +62,11 @@ void Stream::finalize()
     BlobRegistry::finalizeStream(m_internalURL);
 }
 
+void Stream::abort()
+{
+    BlobRegistry::abortStream(m_internalURL);
+}
+
 Stream::~Stream()
 {
     BlobRegistry::unregisterStreamURL(m_internalURL);