Sort the output (for now just the classes and instance members).

lib/compiler/implementation/ssa/closure.dart

 // 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.
 
 class ClosureFieldElement extends Element {
   ClosureFieldElement(SourceString name, ClassElement enclosing)
       : super(name, ElementKind.FIELD, enclosing);
 
   bool isInstanceMember() => true;
   bool isAssignable() => false;
 
   String toString() => "ClosureFieldElement($name)";
+  Token position() => enclosingElement.position();
 }
 
 class ClosureClassElement extends ClassElement {
-  ClosureClassElement(Compiler compiler, Element enclosingElement)
+  Token originalPosition;
+
+  ClosureClassElement(Compiler compiler, Element enclosingElement,
+                      this.originalPosition)
       : super(compiler.closureClass.name, enclosingElement) {
     isResolved = true;
     compiler.closureClass.ensureResolved(compiler);
     supertype = compiler.closureClass.computeType(compiler);
   }
+
+  Token position() => originalPosition;
 }
 
 class BoxElement extends Element {
   BoxElement(SourceString name, Element enclosingElement)
       : super(name, ElementKind.VARIABLE, enclosingElement);
 }
 
 class ThisElement extends Element {
   ThisElement(Element enclosing)
       : super(const SourceString('this'), ElementKind.PARAMETER, enclosing);
@@ skipping 279 matching lines @@
       if (capturedVariableMapping.containsKey(element)) {
         result.add(element);
       };
     }
     scopeData.boxedLoopVariables = result;
   }
 
   ClosureData globalizeClosure(FunctionExpression node) {
     FunctionElement element = elements[node];
     ClassElement globalizedElement =
-        new ClosureClassElement(compiler, element.getCompilationUnit());
+        new ClosureClassElement(compiler,
+                                element.getCompilationUnit(),
+                                element.position());
     FunctionElement callElement =
         new FunctionElement.from(Namer.CLOSURE_INVOCATION_NAME,
                                  element,
                                  globalizedElement);
     globalizedElement.backendMembers =
         const EmptyLink<Element>().prepend(callElement);
     // The nested function's 'this' is the same as the one for the outer
     // function. It could be [null] if we are inside a static method.
     Element thisElement = closureData.thisElement;
     return new ClosureData(element, globalizedElement,
@@ skipping 92 matching lines @@
     declareLocal(elements[node]);
   }
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     inTryCatchOrFinally = true;
     node.visitChildren(this);
     inTryCatchOrFinally = false;
   }
 }