Specify location of SDK when running analyzer.

pkg/testing/lib/src/analyze.dart

 // Copyright (c) 2016, 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.md file.
 
 library testing.analyze;
 
 import 'dart:async' show Stream, Future;
 
 import 'dart:convert' show LineSplitter, UTF8;
 
@@ skipping 98 matching lines @@
   if (uris.isEmpty) return;
   const String analyzerPath = "pkg/analyzer_cli/bin/analyzer.dart";
   Uri analyzer = Uri.base.resolve(analyzerPath);
   if (!await new File.fromUri(analyzer).exists()) {
     throw "Couldn't find '$analyzerPath' in '${Uri.base.toFilePath()}'";
   }
   List<String> arguments = <String>[
     "--packages=${packages.toFilePath()}",
     "--package-warnings",
     "--format=machine",
+    "--dart-sdk=${Uri.base.resolve('sdk/').toFilePath()}",
   ];
   if (analysisOptions != null) {
     arguments.add("--options=${analysisOptions.toFilePath()}");
   }
   arguments.addAll(uris.map((Uri uri) => uri.toFilePath()));
   if (isVerbose) {
     print("Running:\n  ${analyzer.toFilePath()} ${arguments.join(' ')}");
   } else {
     print("Running dartanalyzer.");
   }
@@ skipping 16 matching lines @@
       hasOutput = true;
       print(message);
     }
   }
   if (hasOutput) {
     throw "Non-empty output from analyzer.";
   }
   sw.stop();
   print("Running analyzer took: ${sw.elapsed}.");
 }