Pass AnalysisOptions into SdkCreator, disable changing afterwards.

pkg/analyzer/lib/src/context/context.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.
 
 library analyzer.src.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 2155 matching lines @@
    * Otherwise, it returns `false` to indicate that the result should be
    * computed as usually.
    */
   bool compute(CacheEntry entry, ResultDescriptor result);
 }
 
 /**
  * An [AnalysisContext] that only contains sources for a Dart SDK.
  */
 class SdkAnalysisContext extends AnalysisContextImpl {
+  /**
+   * Initialize a newly created SDK analysis context with the given [options].
+   * Analysis options cannot be changed afterwards.  If the given [options] are
+   * `null`, then default options are used.
+   */
+  SdkAnalysisContext(AnalysisOptions options) {
+    if (options != null) {
+      super.analysisOptions = options;
+    }
+  }
+
   @override
+  void set analysisOptions(AnalysisOptions options) {
+    throw new StateError('AnalysisOptions of SDK context cannot be changed.');
+  }
+
+    @override
   AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
     if (factory == null) {
       return super.createCacheFromSourceFactory(factory);
     }
     DartSdk sdk = factory.dartSdk;
     if (sdk == null) {
       throw new IllegalArgumentException(
           "The source factory for an SDK analysis context must have a DartUriResolver");
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }