Quick fixes 'Create class' and 'Create constructor'

compiler/java/com/google/dart/compiler/resolver/ClassElement.java

 // Copyright (c) 2012, 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.dart.compiler.type.InterfaceType;
 import com.google.dart.compiler.type.Type;
 
 import java.util.List;
@@ skipping 39 matching lines @@
   boolean isAbstract();
 
   ConstructorElement lookupConstructor(String name);
 
   /**
    * @return the {@link Element}s which are declared in superclass or interfaces, but not
    *         implemented in this class. May be <code>null</code> if this {@link ClassElement} is
    *         {@link ClassNodeElement} and was not analyzed yet.
    */
   List<Element> getUnimplementedMembers();
+  
+  int getOpenBraceOffset();
+  
+  int getCloseBraceOffset();
 }