Add initial Screen Orientation API support: IDL changes

Source/modules/screen_orientation/ScreenOrientation.h

Index: Source/modules/screen_orientation/ScreenOrientation.h
diff --git a/Source/modules/screen_orientation/ScreenOrientation.h b/Source/modules/screen_orientation/ScreenOrientation.h
new file mode 100644
index 0000000000000000000000000000000000000000..2fb20d810fb25b231e44ab710bd94b1a7be67613
--- /dev/null
+++ b/Source/modules/screen_orientation/ScreenOrientation.h
@@ -0,0 +1,39 @@
+// Copyright 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.
+
+#ifndef ScreenOrientation_h
+#define ScreenOrientation_h
+
+#include "core/events/EventTarget.h"
+#include "core/frame/DOMWindowProperty.h"
+#include "platform/Supplementable.h"
+#include "wtf/Vector.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+class Screen;
+
+class ScreenOrientation FINAL : public Supplement<Screen>, DOMWindowProperty {
+public:
+    static ScreenOrientation* from(Screen*);
+    virtual ~ScreenOrientation();
+
+    DEFINE_STATIC_ATTRIBUTE_EVENT_LISTENER(orientationchange);
+
+    static const AtomicString& orientation(Screen*);
+    static bool lockOrientation(Screen*, const Vector<String>& orientations);
+    static bool lockOrientation(Screen*, const AtomicString& orientation);
+    static void unlockOrientation(Screen*);
+
+private:
+    explicit ScreenOrientation(Screen*);
+    static const char* supplementName();
+    Screen* screen() const;
+};
+
+} // namespace WebCore
+
+#endif // ScreenOrientation_h