Roll WebCore IDL to multivm@418

third_party/WebCore/Modules/filesystem/FileWriter.idl

Index: third_party/WebCore/Modules/filesystem/FileWriter.idl
diff --git a/third_party/WebCore/Modules/filesystem/FileWriter.idl b/third_party/WebCore/Modules/filesystem/FileWriter.idl
index c6a88f3665f159e493c619235cb0dfa5c51704e2..754fa0f14b226f2d1dda7e411dc4ae6f62702ddb 100644
--- a/third_party/WebCore/Modules/filesystem/FileWriter.idl
+++ b/third_party/WebCore/Modules/filesystem/FileWriter.idl
@@ -60,5 +60,15 @@ module html {
                  attribute EventListener onabort;
                  attribute EventListener onerror;
                  attribute EventListener onwriteend;
+
+        // EventTarget interface
+        void addEventListener(in DOMString type,
+                              in EventListener listener,
+                              in [Optional] boolean useCapture);
+        void removeEventListener(in DOMString type,
+                                 in EventListener listener,
+                                 in [Optional] boolean useCapture);
+        boolean dispatchEvent(in Event evt)
+            raises(EventException);
     };
 }