Refactor runtime into libraries, better type reps

lib/src/dependency_graph.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.
 
 /// Tracks the shape of the import/export graph and dependencies between files.
 library dev_compiler.src.dependency_graph;
 
 import 'dart:collection' show HashSet, HashMap;
 
 import 'package:analyzer/analyzer.dart' show parseDirectives;
@@ skipping 481 matching lines @@
     action(node);
   }
   helper(start);
 }
 
 bool _same(Set a, Set b) => a.length == b.length && a.containsAll(b);
 
 /// Runtime files added to all applications when running the compiler in the
 /// command line.
 final defaultRuntimeFiles = () {
-  var files = ['harmony_feature_check.js', 'dart_runtime.js',];
+  var files = [
+    'harmony_feature_check.js',
+    'dart_utils.js',
+    'dart_library.js',
+    '_errors.js',
+    '_types.js',
+    '_rtti.js',
+    '_classes.js',
+    '_operations.js',
+    'dart_runtime.js',
+  ];
   files.addAll(corelibOrder.map((l) => l.replaceAll('.', '/') + '.js'));
   return files;
 }();
 
 /// Curated order to minimize lazy classes needed by dart:core and its
 /// transitive SDK imports.
 const corelibOrder = const [
   'dart.core',
   'dart.collection',
   'dart._internal',
@@ skipping 11 matching lines @@
   'dart.convert',
   // _foreign_helper is not included, as it only defines the JS builtin that
   // the compiler handles at compile time.
 ];
 
 /// Runtime files added to applications when running in server mode.
 final runtimeFilesForServerMode = new List<String>.from(defaultRuntimeFiles)
   ..addAll(const ['messages_widget.js', 'messages.css']);
 
 final _log = new Logger('dev_compiler.dependency_graph');