Disable timeouts when debugging.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1263593005 .

lib/src/runner.dart

@@ -11,6 +11,7 @@ import 'package:async/async.dart';
 
 import 'backend/metadata.dart';
 import 'backend/test_platform.dart';
+import 'frontend/timeout.dart';
 import 'runner/application_exception.dart';
 import 'runner/configuration.dart';
 import 'runner/engine.dart';
@@ -56,6 +57,7 @@ class Runner {
   /// Creates a new runner based on [configuration].
   factory Runner(Configuration configuration) {
     var metadata = new Metadata(
+        timeout: configuration.pauseAfterLoad ? Timeout.none : null,
         verboseTrace: configuration.verboseTrace);
     var loader = new Loader(configuration.platforms,
         pubServeUrl: configuration.pubServeUrl,
@@ -96,7 +98,6 @@ class Runner {
 
     var success;
     if (_configuration.pauseAfterLoad) {
-      // TODO(nweiz): disable timeouts when debugging.
       success = await _loadThenPause(suites);
     } else {
       _suiteSubscription = suites.listen(_engine.suiteSink.add);

test/runner/pause_after_load_test.dart

@@ -235,6 +235,44 @@ void main() {
     test.stderr.expect(isDone);
   }, testOn: "!windows");
 
+  test("disables timeouts", () {
+    d.file("test.dart", """
+import 'package:test/test.dart';
+
+void main() {
+  print('loaded test 1!');
+
+  test("success", () {}, timeout: new Timeout(Duration.ZERO));
+}
+""").create();
+
+    var test = runTest(
+        ["--pause-after-load", "-p", "dartium", "-n", "success", "test.dart"]);
+    test.stdout.expect(consumeThrough("loaded test 1!"));
+    test.stdout.expect(consumeThrough(inOrder([
+      "The test runner is paused. Open the dev console in Dartium and set "
+          "breakpoints. Once you're",
+      "finished, return to this terminal and press Enter."
+    ])));
+
+    schedule(() async {
+      var nextLineFired = false;
+      test.stdout.next().then(expectAsync((line) {
+        expect(line, contains("+0: success"));
+        nextLineFired = true;
+      }));
+
+      // Wait a little bit to be sure that the tests don't start running without
+      // our input.
+      await new Future.delayed(new Duration(seconds: 2));
+      expect(nextLineFired, isFalse);
+    });
+
+    test.writeLine('');
+    test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+    test.shouldExit(0);
+  });
+
   // Regression test for #304.
   test("supports test name patterns", () {
     d.file("test.dart", """