Sort procedures by source positions.

pkg/front_end/lib/src/fasta/kernel/kernel_library_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.kernel_library_builder;
 
 import 'package:kernel/ast.dart';
 
 import 'package:kernel/clone.dart' show CloneVisitor;
 
@@ skipping 33 matching lines @@
         KernelProcedureBuilder,
         KernelTypeBuilder,
         KernelTypeVariableBuilder,
         MemberBuilder,
         MetadataBuilder,
         MixedAccessor,
         NamedMixinApplicationBuilder,
         PrefixBuilder,
         ProcedureBuilder,
         TypeBuilder,
-        TypeVariableBuilder;
+        TypeVariableBuilder,
+        compareProcedures;
 
 class KernelLibraryBuilder
     extends SourceLibraryBuilder<KernelTypeBuilder, Library> {
   final Library library;
 
   final Map<String, SourceClassBuilder> mixinApplicationClasses =
       <String, SourceClassBuilder>{};
 
   final List<List> argumentsWithMissingDefaultValues = <List>[];
 
@@ skipping 252 matching lines @@
     } else if (builder is BuiltinTypeBuilder) {
       // Nothing needed.
     } else {
       internalError("Unhandled builder: ${builder.runtimeType}");
     }
   }
 
   Library build() {
     super.build();
     library.name = name;
+    library.procedures.sort(compareProcedures);
     return library;
   }
 
   @override
   Builder buildAmbiguousBuilder(
       String name, Builder builder, Builder other, int charOffset,
       {bool isExport: false, bool isImport: false}) {
     if (builder == other) return builder;
     if (builder is InvalidTypeBuilder) return builder;
     if (other is InvalidTypeBuilder) return other;
@@ skipping 175 matching lines @@
   }
 }
 
 bool isConstructorName(String name, String className) {
   if (name.startsWith(className)) {
     if (name.length == className.length) return true;
     if (name.startsWith(".", className.length)) return true;
   }
   return false;
 }