add 'imports' field for OutputUnitInfo

lib/info.dart

 // Copyright (c) 2015, 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.
 
 /// Data produced by dart2js when run with the `--dump-info` flag.
 library dart2js_info.info;
 
 import 'dart:convert';
 
 import 'src/measurements.dart';
@@ skipping 184 matching lines @@
 
   LibraryInfo._(String serializedId) : super._fromId(serializedId);
 
   dynamic accept(InfoVisitor visitor) => visitor.visitLibrary(this);
 }
 
 /// Information about an output unit. Normally there is just one for the entire
 /// program unless the application uses deferred imports, in which case there
 /// would be an additional output unit per deferred chunk.
 class OutputUnitInfo extends BasicInfo {
+  /// The deferred imports that will load this output unit.
+  List<String> imports = <String>[];

[Siggi Cherem (dart-lang), 2015/11/04 03:33:16]

Oh funny, my initial thought was that you meant "imports" as the list of shared
outputunitinfos that this info needs, but this makes more sense :). I'm ok with
the current name, another idea if you prefer would be `loadingImports`? up to
you.

[Harry Terkelsen, 2015/11/12 19:21:01]

I'm keeping it as imports to match the name in dart2js

+
   static int _ids = 0;
+
   OutputUnitInfo(String name, int size)
       : super(InfoKind.outputUnit, _ids++, name, null, size, null);
 
   OutputUnitInfo._(String serializedId) : super._fromId(serializedId);
 
   dynamic accept(InfoVisitor visitor) => visitor.visitOutput(this);
 }
 
 /// Information about a class element.
 class ClassInfo extends BasicInfo {
@@ skipping 294 matching lines @@
 
   visitConstant(ConstantInfo info) {}
 
   visitFunction(FunctionInfo info) {
     info.closures.forEach(visitFunction);
   }
 
   visitTypedef(TypedefInfo info) {}
   visitOutput(OutputUnitInfo info) {}
 }