- Change "static final" to "static const" in the lib/ directory.

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
  */
-final int DART2JS_PLATFORM = 1;
+const int DART2JS_PLATFORM = 1;
 
 /**
  * A bit flag used by [LibraryInfo] indicating that a library is used by the VM
  */
-final int VM_PLATFORM = 2;
+const int VM_PLATFORM = 2;
 
 /**
  * Mapping of "dart:" library name (e.g. "core") to information about that library.
  * This information is structured such that Dart Editor can parse this file
  * and extract the necessary information without executing it
  * while other tools can access via execution.
  */
-final Map<String, LibraryInfo> LIBRARIES = const <LibraryInfo> {
+const Map<String, LibraryInfo> LIBRARIES = const <LibraryInfo> {
 
   // Used by VM applications
   "builtin": const LibraryInfo(
       "builtin/builtin_runtime.dart",
       category: "Server",
       platforms: VM_PLATFORM),
 
   // Is moving to pkg directory
   "compiler": const LibraryInfo(
       "compiler/compiler.dart",
@@ skipping 132 matching lines @@
            this.implementation = false,
            this.documented = true,
            this.platforms = DART2JS_PLATFORM | VM_PLATFORM]);
 
   bool isDart2JsLibrary() => (platforms & DART2JS_PLATFORM) != 0;
   bool isVmLibrary() => (platforms & VM_PLATFORM) != 0;
 
   String getDart2JsPath() => dart2jsPath != null ? "lib/$dart2jsPath" : "lib/$path";
   String getDart2jsPatchPath() => dart2jsPatchPath != null ? "lib/$dart2jsPatchPath" : null;
 }