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

tools/testing/dart/runtime_configuration.dart

 // Copyright (c) 2014, 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 runtime_configuration;
 
 import 'compiler_configuration.dart' show
     CommandArtifact;
 
 // TODO(ahe): Remove this import, we can precompute all the values required
@@ skipping 200 matching lines @@
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     String script = artifact.filename;
     String type = artifact.mimeType;
     if (script != null && type != 'application/dart') {
       throw "Dart VM cannot run files of type '$type'.";
     }
+    String executable = suite.configuration['noopt'] 
+        ? suite.dartVmNooptBinaryFileName
+        : suite.dartVmBinaryFileName;
     return <Command>[commandBuilder.getVmCommand(
-          suite.dartVmBinaryFileName, arguments, environmentOverrides)];
+          executable, arguments, environmentOverrides)];
   }
 }
 
 
 class DartPrecompiledRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
@@ skipping 22 matching lines @@
 class DummyRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     throw "Unimplemented runtime '$runtimeType'";
   }
 }