- Remove uses of the dart_bin binary.

tools/test.dart

-#!/usr/bin/env dart_bin
+#!/usr/bin/env dart
 // Copyright (c) 2011, 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.
 
 #library("test");
 
 #import("testing/dart/test_runner.dart");
 #import("testing/dart/test_options.dart");
 
 #import("../tests/co19/test_config.dart");
@@ skipping 50 matching lines @@
     activityStarted();
     new IsolateTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     activityStarted();
     new StubGeneratorTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     if (conf["component"] == "vm") {
       activityStarted();
       new VMTestSuite(conf).forEachTest(queue.runTest, activityCompleted);
     }
   }
 }