VM: Replace dart --noopt with new binary target dart_noopt.

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 194 matching lines @@
       String suffix = executableBinarySuffix;
       dartExecutable = useSdk
           ? '$buildDir/dart-sdk/bin/dart$suffix'
           : '$buildDir/dart$suffix';
     }
 
     TestUtils.ensureExists(dartExecutable, configuration);
     return dartExecutable;
   }
 
+  String get dartVmNooptBinaryFileName {
+    // Controlled by user with the option "--dart".
+    String dartExecutable = configuration['dart'];
+
+    if (dartExecutable == '') {
+      String suffix = executableBinarySuffix;
+      dartExecutable = useSdk
+          ? '$buildDir/dart-sdk/bin/dart_noopt$suffix'
+          : '$buildDir/dart_noopt$suffix';
+    }
+
+    TestUtils.ensureExists(dartExecutable, configuration);
+    return dartExecutable;
+  }
+
   String get dartPrecompiledBinaryFileName {
     // Controlled by user with the option "--dart_precompiled".
     String dartExecutable = configuration['dart_precompiled'];
 
     if (dartExecutable == null || dartExecutable == '') {
       String suffix = executableBinarySuffix;
       dartExecutable = '$buildDir/dart_precompiled_runtime$suffix';
     }
 
     TestUtils.ensureExists(dartExecutable, configuration);
@@ skipping 2218 matching lines @@
       for (var key in PATH_REPLACEMENTS.keys) {
         if (path.startsWith(key)) {
           path = path.replaceFirst(key, PATH_REPLACEMENTS[key]);
           break;
         }
       }
     }
     return path;
   }
 }