Use spec.sum SDK summary and CONSTANT_EXPRESSION_RESOLVED.

pkg/analyzer/lib/src/generated/sdk_io.dart

 // Copyright (c) 2014, 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 analyzer.src.generated.sdk_io;
 
 import 'dart:collection';
 import 'dart:io';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 538 matching lines @@
       _uriToSourceMap[dartUri] = source;
     }
     return source;
   }
 
   /**
    * Return the [SdkBundle] for this SDK, if it exists, or `null` otherwise.
    */
   SdkBundle _getSummarySdkBundle() {
     String rootPath = directory.getAbsolutePath();
-    String path = pathos.join(rootPath, 'lib', '_internal', 'analysis_summary');
+    String path = pathos.join(rootPath, 'lib', '_internal', 'spec.sum');
     try {
       File file = new File(path);
       if (file.existsSync()) {
         List<int> bytes = file.readAsBytesSync();
         return new SdkBundle.fromBuffer(bytes);
       }
     } catch (exception, stackTrace) {
       AnalysisEngine.instance.logger.logError(
           'Failed to load SDK analysis summary from $path',
           new CaughtException(exception, stackTrace));
@@ skipping 92 matching lines @@
     SdkLibrariesReader_LibraryBuilder libraryBuilder =
         new SdkLibrariesReader_LibraryBuilder(_useDart2jsPaths);
     // If any syntactic errors were found then don't try to visit the AST
     // structure.
     if (!errorListener.errorReported) {
       unit.accept(libraryBuilder);
     }
     return libraryBuilder.librariesMap;
   }
 }