Add initial Blink-side support for the Screen Orientation API

Source/core/frame/Screen.h

Index: Source/core/frame/Screen.h
diff --git a/Source/core/frame/Screen.h b/Source/core/frame/Screen.h
index b9ce445318b6a981a76c788fdd9474a26faab420..14d0032f0596811aaffa91e2e6566002b8d87ad0 100644
--- a/Source/core/frame/Screen.h
+++ b/Source/core/frame/Screen.h
@@ -31,7 +31,9 @@
 #define Screen_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowProperty.h"
+#include "platform/Supplementable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
@@ -39,7 +41,8 @@ namespace WebCore {
 
     class Frame;
 
-    class Screen FINAL : public ScriptWrappable, public RefCounted<Screen>, public DOMWindowProperty {
+    class Screen FINAL : public ScriptWrappable, public RefCounted<Screen>, public EventTargetWithInlineData, public DOMWindowProperty, public Supplementable<Screen> {
+        REFCOUNTED_EVENT_TARGET(Screen);
     public:
         static PassRefPtr<Screen> create(Frame *frame) { return adoptRef(new Screen(frame)); }
 
@@ -52,6 +55,9 @@ namespace WebCore {
         unsigned availHeight() const;
         unsigned availWidth() const;
 
+        virtual const AtomicString& interfaceName() const OVERRIDE;
+        virtual ExecutionContext* executionContext() const OVERRIDE;
+
     private:
         explicit Screen(Frame*);
     };