Implement ReadableStream as a V8 extra

Source/core/streams/ScriptQueuingStrategy.cpp

Index: Source/core/streams/ScriptQueuingStrategy.cpp
diff --git a/Source/core/streams/ScriptQueuingStrategy.cpp b/Source/core/streams/ScriptQueuingStrategy.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..10f72ea591e02763f9e11389606c54e81d0fdfb0
--- /dev/null
+++ b/Source/core/streams/ScriptQueuingStrategy.cpp
@@ -0,0 +1,23 @@
+// Copyright 2015 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 "core/streams/ScriptQueuingStrategy.h"
+
+namespace blink {
+
+ScriptQueuingStrategy::ScriptQueuingStrategy(double highWaterMark) : m_highWaterMark(highWaterMark)
+{
+}
+
+double ScriptQueuingStrategy::highWaterMark()
+{
+    return m_highWaterMark;
+}
+
+DEFINE_TRACE(ScriptQueuingStrategy)
+{
+}
+
+} // namespace blink