Fix the test script for dart_product runtime

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
diff --git a/tools/testing/dart/test_runner.dart b/tools/testing/dart/test_runner.dart
index ffd99217056de79dd0b39826deadd5f05e9694d6..9a82e583ce3b4b2dfbcbeb3596f30fb45691295d 100644
--- a/tools/testing/dart/test_runner.dart
+++ b/tools/testing/dart/test_runner.dart
@@ -1679,7 +1679,8 @@ CommandOutput createCommandOutput(Command command,
     return new VmCommandOutputImpl(
         command, exitCode, timedOut, stdout, stderr, time, pid);
   } else if (command is CompilationCommand) {
-    if (command.displayName == 'precompiler.dart') {
+    if (command.displayName == 'precompiler.dart' ||
+        command.displayName == 'dart2snapshot') {
       return new VmCommandOutputImpl(
           command, exitCode, timedOut, stdout, stderr, time, pid);
     }