Sort procedures by source positions.

pkg/front_end/lib/src/fasta/source/source_class_builder.dart

 // Copyright (c) 2016, 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.
 
 library fasta.source_class_builder;
 
 import 'package:kernel/ast.dart'
     show Class, Constructor, Supertype, TreeNode, setParents;
 
 import '../errors.dart' show internalError;
 
 import '../kernel/kernel_builder.dart'
     show
         Builder,
         ConstructorReferenceBuilder,
         KernelClassBuilder,
         KernelFieldBuilder,
         KernelFunctionBuilder,
         KernelLibraryBuilder,
         KernelTypeBuilder,
         KernelTypeVariableBuilder,
         LibraryBuilder,
         MetadataBuilder,
         ProcedureBuilder,
-        TypeVariableBuilder;
+        TypeVariableBuilder,
+        compareProcedures;
 
 import '../dill/dill_member_builder.dart' show DillMemberBuilder;
 
 import '../util/relativize.dart' show relativizeUri;
 
 Class initializeClass(
     Class cls, String name, LibraryBuilder parent, int charOffset) {
   cls ??= new Class(name: name);
   cls.fileUri ??= relativizeUri(parent.fileUri);
   if (cls.fileOffset == TreeNode.noOffset) {
@@ skipping 70 matching lines @@
     cls.isAbstract = isAbstract;
     if (interfaces != null) {
       for (KernelTypeBuilder interface in interfaces) {
         Supertype supertype = interface.buildSupertype(library);
         if (supertype != null) {
           // TODO(ahe): Report an error if supertype is null.
           cls.implementedTypes.add(supertype);
         }
       }
     }
+
+    cls.procedures.sort(compareProcedures);
     return cls;
   }
 
   Builder findConstructorOrFactory(String name) => constructors[name];
 
   void addSyntheticConstructor(Constructor constructor) {
     String name = constructor.name.name;
     cls.constructors.add(constructor);
     constructor.parent = cls;
     DillMemberBuilder memberBuilder = new DillMemberBuilder(constructor, this);
@@ skipping 16 matching lines @@
 Map<String, Builder> computeConstructors(Map<String, Builder> members) {
   Map<String, Builder> constructors = <String, Builder>{};
   members.forEach((String name, Builder builder) {
     if (builder is ProcedureBuilder &&
         (builder.isConstructor || builder.isFactory)) {
       constructors[name] = builder;
     }
   });
   return constructors;
 }