Dartifying remainder of Index DB APIs.

tools/dom/templates/html/impl/impl_IDBCursor.darttemplate

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of $LIBRARYNAME;
+
+$(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+  @DomName('IDBCursor.delete')
+  Future delete() {
+   try {
+      return _completeRequest($dom_delete());
+    } catch (e, stacktrace) {
+      return new Future.immediateError(e, stacktrace);
+    }
+  }
+
+  @DomName('IDBCursor.value')
+  Future update(value) {
+   try {
+      return _completeRequest($dom_update(value));
+    } catch (e, stacktrace) {
+      return new Future.immediateError(e, stacktrace);
+    }
+  }
+
+  $!MEMBERS
+}