Add client/tests/client web tests to the test.dart test script.

tools/testing/dart/test_progress.dart

Index: tools/testing/dart/test_progress.dart
diff --git a/tools/testing/dart/test_progress.dart b/tools/testing/dart/test_progress.dart
index e7434682861db35519e9622b917e943b44ab0f7e..ffe10721f219df000895157b3416039abd1fc124 100644
--- a/tools/testing/dart/test_progress.dart
+++ b/tools/testing/dart/test_progress.dart
@@ -124,7 +124,7 @@ class ProgressIndicator {
       print('\nstderr:');
       test.output.stderr.forEach((s) => print(s));
     }
-    if (test is BrowserTestCase) {
+    if (test is BrowserTestCase && test.dynamic.compilerPath != null) {
       print('\nCompilation command: ${test.dynamic.compilerPath} ' +
             Strings.join(test.dynamic.compilerArguments, ' '));
     }