Decouple FileSystem and WebSQL callbacks from VoidCallback and it non-refcounted

Source/modules/filesystem/Entry.idl

Index: Source/modules/filesystem/Entry.idl
diff --git a/Source/modules/filesystem/Entry.idl b/Source/modules/filesystem/Entry.idl
index 6f0ac896bde2889dbae85f9c5c4b81f5ce65d124..bb201adccb1396c3ae7be89bdb15346eac4a9734 100644
--- a/Source/modules/filesystem/Entry.idl
+++ b/Source/modules/filesystem/Entry.idl
@@ -42,6 +42,6 @@
     void moveTo(DirectoryEntry parent, [TreatNullAs=NullString, TreatUndefinedAs=NullString] optional DOMString name, optional EntryCallback successCallback, optional ErrorCallback errorCallback);
     void copyTo(DirectoryEntry parent, [TreatNullAs=NullString, TreatUndefinedAs=NullString] optional DOMString name, optional EntryCallback successCallback, optional ErrorCallback errorCallback);
     DOMString toURL();
-    void remove(VoidCallback successCallback, optional ErrorCallback errorCallback);
+    void remove(FileSystemVoidCallback successCallback, optional ErrorCallback errorCallback);
     void getParent(optional EntryCallback successCallback, optional ErrorCallback errorCallback);
 };