Fix CLI SDK option config timing (#26129).

pkg/analyzer_cli/lib/src/analyzer_impl.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_cli.src.analyzer_impl;
 
 import 'dart:collection';
 import 'dart:io';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/source/error_processor.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
-import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:analyzer_cli/src/error_formatter.dart';
 import 'package:analyzer_cli/src/options.dart';
 import 'package:path/path.dart' as pathos;
 
 /// The maximum number of sources for which AST structures should be kept in the cache.
 const int _maxCacheSize = 512;
 
-DirectoryBasedDartSdk sdk;
-
 int currentTimeMillis() => new DateTime.now().millisecondsSinceEpoch;
 
 /// Analyzes single library [File].
 class AnalyzerImpl {
   static final PerformanceTag _prepareErrorsTag =
       new PerformanceTag("AnalyzerImpl.prepareErrors");
   static final PerformanceTag _resolveLibraryTag =
       new PerformanceTag("AnalyzerImpl._resolveLibrary");
 
   final CommandLineOptions options;
@@ skipping 322 matching lines @@
   }
 
   @override
   void logInformation(String message, [CaughtException exception]) {
     outSink.writeln(message);
     if (exception != null) {
       outSink.writeln(exception);
     }
   }
 }