Also update the test harness for unification of dart_no_snapshot into dart_bootstrap.

tools/testing/dart/compiler_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 compiler_configuration;
 
 import 'dart:io' show
     Platform;
 
 import 'runtime_configuration.dart' show
@@ skipping 336 matching lines @@
         '$tempDir',
         'application/dart-precompiled');
   }
 
   CompilationCommand computeCompilationCommand(
       String tempDir,
       String buildDir,
       CommandBuilder commandBuilder,
       List arguments,
       Map<String, String> environmentOverrides) {
-    var exec = "$buildDir/dart_no_snapshot";
+    var exec = "$buildDir/dart_bootstrap";
     var args = new List();
     args.add("--gen-precompiled-snapshot=$tempDir");
     args.addAll(arguments);
 
     return commandBuilder.getCompilationCommand(
         'precompiler', tempDir, !useSdk,
         bootstrapDependencies(buildDir),
         exec, args, environmentOverrides);
   }
 
@@ skipping 251 matching lines @@
       RuntimeConfiguration runtimeConfiguration,
       String buildDir,
       TestInformation info,
       List<String> vmOptions,
       List<String> sharedOptions,
       List<String> originalArguments,
       CommandArtifact artifact) {
     return <String>[];
   }
 }