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

lib/compiler/implementation/emitter.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.
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
 class ClosureInvocationElement extends FunctionElement {
   ClosureInvocationElement(SourceString name,
@@ skipping 469 matching lines @@
     Set<ClassElement> neededClasses =
         new Set<ClassElement>.from(instantiatedClasses);
     for (ClassElement element in instantiatedClasses) {
       for (ClassElement superclass = element.superclass;
            superclass !== null;
            superclass = superclass.superclass) {
         if (neededClasses.contains(superclass)) break;
         neededClasses.add(superclass);
       }
     }
-    for (ClassElement element in neededClasses) {
+    List<ClassElement> sortedClasses =
+        new List<ClassElement>.from(neededClasses);
+    sortedClasses.sort((ClassElement class1, ClassElement class2) {
+      // We sort by the ids of the classes. There is no guarantee that these
+      // ids are meaningful (or even deterministic), but in the current
+      // implementation they are increasing within a source file.
+      return class1.id - class2.id;
+    });
+    for (ClassElement element in sortedClasses) {
       generateClass(element, buffer);
     }
 
     // The closure class could have become necessary because of the generation
     // of stubs.
     ClassElement closureClass = compiler.closureClass;
     if (needsClosureClass && !instantiatedClasses.contains(closureClass)) {
       generateClass(closureClass, buffer);
     }
   }
@@ skipping 397 matching lines @@
       mainBuffer.add('function init() {\n');
       mainBuffer.add('  $isolateProperties = {};\n');
       addDefineClassAndFinishClassFunctionsIfNecessary(mainBuffer);
       emitFinishIsolateConstructor(mainBuffer);
       mainBuffer.add('}\n');
       compiler.assembledCode = mainBuffer.toString();
     });
     return compiler.assembledCode;
   }
 }