Move modules-related attributes out from Window.idl.

Source/modules/webaudio/DOMWindowWebAudio.cpp

Index: Source/modules/webaudio/DOMWindowWebAudio.cpp
diff --git a/Source/modules/webaudio/DOMWindowWebAudio.cpp b/Source/modules/webaudio/DOMWindowWebAudio.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4d97c305b180138c752c0c47910035cd1f95972b
--- /dev/null
+++ b/Source/modules/webaudio/DOMWindowWebAudio.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/webaudio/DOMWindowWebAudio.h"
+
+#include "core/frame/DOMWindow.h"
+
+namespace WebCore {
+
+DOMWindowWebAudio::DOMWindowWebAudio(DOMWindow& window)
+    : DOMWindowProperty(window.frame())
+    , m_window(window)
+{
+}
+
+DOMWindowWebAudio::~DOMWindowWebAudio()
+{
+}
+
+} // namespace WebCore
+