Implement WindowEventHandlers

Source/core/frame/WindowEventHandlers.idl

Index: Source/core/frame/WindowEventHandlers.idl
diff --git a/Source/core/css/xhtmlmp.css b/Source/core/frame/WindowEventHandlers.idl
similarity index 72%
copy from Source/core/css/xhtmlmp.css
copy to Source/core/frame/WindowEventHandlers.idl
index 11ea1cf1a031cfbf2694983c810bab1f925d99ae..b7634ae98bf60421bd51029ce00e5a14074bf343 100644
--- a/Source/core/css/xhtmlmp.css
+++ b/Source/core/frame/WindowEventHandlers.idl
@@ -27,11 +27,21 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* Default styles for XHTML Mobile Profile documents where they differ from html.css */
-
-@viewport {
-    width: auto;
-    /* Ideally these should be removed. Currently here to avoid test result regressions. */
-    min-zoom: 0.25;
-    max-zoom: 5;
-}
+[
+    NoInterfaceObject,
+    ImplementedAs=DOMWindowEventHandlers
+] interface WindowEventHandlers {
+    //attribute EventHandler onafterprint;
+    //attribute EventHandler onbeforeprint;
+    attribute EventHandler onbeforeunload;
+    attribute EventHandler onhashchange;
+    attribute EventHandler onmessage;
+    attribute EventHandler onoffline;
+    attribute EventHandler ononline;
+    attribute EventHandler onpagehide;
+    attribute EventHandler onpageshow;
+    attribute EventHandler onpopstate;
+    attribute EventHandler onresize;
+    attribute EventHandler onstorage;
+    attribute EventHandler onunload;
+};