Move modules-related attributes out from Window.idl.

Source/modules/mediastream/DOMWindowMediaStream.cpp

Index: Source/modules/mediastream/DOMWindowMediaStream.cpp
diff --git a/Source/modules/mediastream/DOMWindowMediaStream.cpp b/Source/modules/mediastream/DOMWindowMediaStream.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..28b7cfdb094ea30deb3ed5d70dea0d51cdd3a3f9
--- /dev/null
+++ b/Source/modules/mediastream/DOMWindowMediaStream.cpp
@@ -0,0 +1,23 @@
+// Copyright (c) 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/mediastream/DOMWindowMediaStream.h"
+
+#include "core/frame/DOMWindow.h"
+
+namespace WebCore {
+
+DOMWindowMediaStream::DOMWindowMediaStream(DOMWindow& window)
+    : DOMWindowProperty(window.frame())
+    , m_window(window)
+{
+}
+
+DOMWindowMediaStream::~DOMWindowMediaStream()
+{
+}
+
+} // namespace WebCore
+