Fix test/runner/signal_test.

test/runner/signal_test.dart

Index: test/runner/signal_test.dart
diff --git a/test/runner/signal_test.dart b/test/runner/signal_test.dart
index ffb2de5be7a673ba6097cad31301e89089b02c82..229024b5dd88b3887c0dcdd37768e5a9c2863a5d 100644
--- a/test/runner/signal_test.dart
+++ b/test/runner/signal_test.dart
@@ -148,7 +148,9 @@ void main() {
 """);
 
       return _startTest(["-p", "content-shell", "test.dart"]).then((process) {
-        return _lines.bind(process.stdout).skip(3).first.then((line) {
+        // The first line is blank, and the second is a status line from the
+        // reporter.
+        return _lines.bind(process.stdout).skip(2).first.then((line) {
           expect(line, equals("running test"));
           process.kill();
           return process.exitCode;