Remove compile time flag ORIENTATION_EVENT and use runtime flag instead. Update layout test case to…

Source/core/frame/DOMWindow.h

Index: Source/core/frame/DOMWindow.h
diff --git a/Source/core/frame/DOMWindow.h b/Source/core/frame/DOMWindow.h
index fbdee4942b3b1c39c842bdef3bbf2b66c4660afa..accccdcd21f3d3162e2570e6cbd5996f9cdde626 100644
--- a/Source/core/frame/DOMWindow.h
+++ b/Source/core/frame/DOMWindow.h
@@ -284,15 +284,12 @@ enum PageshowEventPersistence {
         ApplicationCache* applicationCache() const;
         ApplicationCache* optionalApplicationCache() const { return m_applicationCache.get(); }
 
-#if ENABLE(ORIENTATION_EVENTS)
         // This is the interface orientation in degrees. Some examples are:
         //  0 is straight up; -90 is when the device is rotated 90 clockwise;
         //  90 is when rotated counter clockwise.
         int orientation() const;
 
         DEFINE_ATTRIBUTE_EVENT_LISTENER(orientationchange);
-#endif
-
         DEFINE_ATTRIBUTE_EVENT_LISTENER(touchstart);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(touchmove);
         DEFINE_ATTRIBUTE_EVENT_LISTENER(touchend);