Add a flag to disable the reporting and generation of hints in the analyzer.

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 1290 matching lines @@
   List<String> commonArgumentsFromFile(Path filePath, Map optionsFromFile) {
     List args = TestUtils.standardOptions(configuration);
 
     String packageRoot = packageRootArgument(optionsFromFile['packageRoot']);
     if (packageRoot != null) {
       args.add(packageRoot);
     }
     args.addAll(additionalOptions(filePath));
     if (configuration['analyzer']) {
       args.add('--machine');
+      args.add('--no-hints');
     }
 
     bool isMultitest = optionsFromFile["isMultitest"];
     List<String> dartOptions = optionsFromFile["dartOptions"];
 
     assert(!isMultitest || dartOptions == null);
     if (dartOptions == null) {
       args.add(filePath.toNativePath());
     } else {
       var executable_name = dartOptions[0];
@@ skipping 727 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);
    }
 }