Do not retry intentionally failing tests on browsers.

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 1335 matching lines @@
                 contentShellFilename,
                 fullHtmlPath,
                 contentShellOptions,
                 dartFlags,
                 environmentOverrides));
       } else {
         commandSet.add(
             CommandBuilder.instance.getBrowserTestCommand(
                 runtime,
                 fullHtmlPath,
-                configuration));
+                configuration,
+                !isNegative(info)));
       }
 
       // Create BrowserTestCase and queue it.
       var fullTestName = multitest ? '$testName/$subtestName' : testName;
       var expectation = multitest ? expectations[fullTestName] : expectations;
       var testCase = new BrowserTestCase(
             '$suiteName/$fullTestName',
             commandSet,
             configuration,
             expectation,
@@ skipping 62 matching lines @@
     }
     final Uri htmlFile = tempUri.resolve(filePath.filename);
     new File.fromUri(htmlFile).writeAsStringSync(contents);
 
     var htmlPath = _createUrlPathFromFile(new Path(htmlFile.toFilePath()));
     var fullHtmlPath = _getUriForBrowserTest(htmlPath, null).toString();
     commands.add(CommandBuilder.instance.getBrowserHtmlTestCommand(
         runtime,
         fullHtmlPath,
         configuration,
-        info.expectedMessages));
+        info.expectedMessages,
+        !isNegative(info)));
     String testDisplayName = '$suiteName/$testName';
     var testCase = new BrowserTestCase(
         testDisplayName,
         commands,
         configuration,
         expectations,
         info,
         isNegative(info),
         fullHtmlPath);
     enqueueNewTestCase(testCase);
@@ skipping 386 matching lines @@
       File customHtml = new File(customHtmlPath.toNativePath());
       if (!customHtml.existsSync()) {
         super.enqueueBrowserTest(baseCommands, packageRoot,
                                  info, testName, expectations);
       } else {
         Path relativeHtml = customHtmlPath.relativeTo(TestUtils.dartDir);
         List<Command> commands = []..addAll(baseCommands);
         var fullPath = _createUrlPathFromFile(customHtmlPath);
 
         commands.add(CommandBuilder.instance.getBrowserTestCommand(
-            runtime, fullPath, configuration));
+            runtime, fullPath, configuration, !isNegative(info)));
         String testDisplayName = '$suiteName/$testName';
         enqueueNewTestCase(new BrowserTestCase(testDisplayName,
                                                commands,
                                                configuration,
                                                expectations,
                                                info,
                                                isNegative(info),
                                                relativeHtml.toNativePath()));
 
       }
@@ skipping 625 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);
   }
 }