Update dart:mirrors to use Symbol.

dart/sdk/lib/_internal/libraries.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.
 
 library libraries;
 
 /**
  * A bit flag used by [LibraryInfo] indicating that a library is used by dart2js
  */
 const int DART2JS_PLATFORM = 1;
@@ skipping 101 matching lines @@
         dart2jsPath: "web_gl/dart2js/web_gl_dart2js.dart"),
 
   "web_sql": const LibraryInfo(
         "web_sql/dartium/web_sql_dartium.dart",
         category: "Client",
         dart2jsPath: "web_sql/dart2js/web_sql_dart2js.dart"),
 
   "_collection-dev": const LibraryInfo(
       "_collection_dev/collection_dev.dart",
       category: "Internal",
-      documented: false),
+      documented: false,
+      dart2jsPatchPath:
+          "_internal/compiler/implementation/lib/collection_dev_patch.dart"),
 
   "_js_helper": const LibraryInfo(
       "_internal/compiler/implementation/lib/js_helper.dart",
       category: "Internal",
       documented: false,
       platforms: DART2JS_PLATFORM),
 
   "_interceptors": const LibraryInfo(
       "_internal/compiler/implementation/lib/interceptors.dart",
       category: "Internal",
@@ skipping 68 matching lines @@
                     this.category: "Shared",
                     this.dart2jsPath,
                     this.dart2jsPatchPath,
                     this.implementation: false,
                     this.documented: true,
                     this.platforms: DART2JS_PLATFORM | VM_PLATFORM});
 
   bool get isDart2jsLibrary => (platforms & DART2JS_PLATFORM) != 0;
   bool get isVmLibrary => (platforms & VM_PLATFORM) != 0;
 }