Changes to how we handle fancy stacks:

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 948 matching lines @@
       RandomAccessFile htmlTest =
           new File(htmlPath).openSync(mode: FileMode.WRITE);
       String content = null;
       Path dir = filePath.directoryPath;
       String nameNoExt = filePath.filenameWithoutExtension;
       Path pngPath = dir.append('$nameNoExt.png');
       Path txtPath = dir.append('$nameNoExt.txt');
       Path expectedOutput = null;
       if (new File.fromPath(pngPath).existsSync()) {
         expectedOutput = pngPath;
-        content = getHtmlLayoutContents(scriptType, new Path("$scriptPath"));
+        content = getHtmlLayoutContents(scriptType, new Path("$scriptPath"),
+            configuration['fancy_stacks']);
       } else if (new File.fromPath(txtPath).existsSync()) {
         expectedOutput = txtPath;
-        content = getHtmlLayoutContents(scriptType, new Path("$scriptPath"));
+        content = getHtmlLayoutContents(scriptType, new Path("$scriptPath"),
+          configuration['fancy_stacks']);
       } else {
         content = getHtmlContents(filename, scriptType,
-            new Path("$scriptPath"));
+            new Path("$scriptPath"), configuration['fancy_stacks']);
       }
       htmlTest.writeStringSync(content);
       htmlTest.closeSync();
 
       // Construct the command(s) that compile all the inputs needed by the
       // browser test. For running Dart in DRT, this will be noop commands.
       List<Command> commands = [];
       if (compiler != 'none') {
         commands.add(_compileCommand(
             dartWrapperFilename, compiledDartWrapperFilename,
@@ skipping 244 matching lines @@
       var executable_name = dartOptions[0];
       // TODO(ager): Get rid of this hack when the runtime checkout goes away.
       var file = new File(executable_name);
       if (!file.existsSync()) {
         executable_name = '../$executable_name';
         assert(new File(executable_name).existsSync());
         dartOptions[0] = executable_name;
       }
       args.addAll(dartOptions);
     }
+    // Turn off fancy stacks.
+    if (!configuration['fancy_stacks']) {
+      args.add('--no-fancy-stacks');
+    }
 
     return args;
   }
 
   String packageRoot(String packageRootFromFile) {
     if (packageRootFromFile == "none") {
       return null;
     }
     String packageRoot = packageRootFromFile;
     if (packageRootFromFile == null) {
@@ skipping 705 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
    }
 }