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

lib/compiler/implementation/ssa/closure.dart

Index: lib/compiler/implementation/ssa/closure.dart
diff --git a/lib/compiler/implementation/ssa/closure.dart b/lib/compiler/implementation/ssa/closure.dart
index 82ee51afec661305c02f58d0dda510b39cce048d..780b3ffe31949dfaaabf356859e4887a9fdb325c 100644
--- a/lib/compiler/implementation/ssa/closure.dart
+++ b/lib/compiler/implementation/ssa/closure.dart
@@ -10,15 +10,21 @@ class ClosureFieldElement extends Element {
   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 {
@@ -318,7 +324,9 @@ class ClosureTranslator extends AbstractVisitor {
   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,