Changes to how we handle fancy stacks:

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
===================================================================
--- tools/testing/dart/test_suite.dart	(revision 26205)
+++ tools/testing/dart/test_suite.dart	(working copy)
@@ -794,6 +794,10 @@
         var vmArguments = new List.from(vmOptions);
         vmArguments.addAll([
             '--ignore-unrecognized-flags', '$tempDir/out.dart']);
+        // Turn off fancy stacks.
+        if (!configuration['fancy-stacks']) {
+          vmArguments.add('--no-fancy-stacks');
+        }
         commands.add(CommandBuilder.instance.getCommand(
             "vm", vmFileName, vmArguments, configurationDir));
       } else {
@@ -804,6 +808,10 @@
     case 'none':
       var arguments = new List.from(vmOptions);
       arguments.addAll(args);
+      // Turn off fancy stacks.
+      if (!configuration['fancy-stacks']) {
+        arguments.add('--no-fancy-stacks');
+      }
       return <Command>[CommandBuilder.instance.getCommand(
           'vm', dartShellFileName, arguments, configurationDir)];
 
@@ -966,13 +974,15 @@
       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();