Watchdog test is flaky, try relaxing timeout.

base/watchdog_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Tests for Watchdog class.
 
 #include "base/logging.h"
 #include "base/platform_thread.h"
 #include "base/spin_wait.h"
 #include "base/time.h"
@@ skipping 62 matching lines @@
 TEST(WatchdogTest, AlarmTest) {
   WatchdogCounter watchdog(TimeDelta::FromMilliseconds(10), "Enabled", true);
   watchdog.Arm();
   SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromSeconds(1),
                                    watchdog.alarm_counter() > 0);
   EXPECT_EQ(1, watchdog.alarm_counter());
 
   // Set a time greater than the timeout into the past.
   watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(2));
   // It should instantly go off, but certainly in less than a second.
-  SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromSeconds(1),
+  // In practice, on our trybots, it sometimes takes a little longer!
+  SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMilliseconds(1500),
                                    watchdog.alarm_counter() > 1);
 
   EXPECT_EQ(2, watchdog.alarm_counter());
 }
 
 // Make sure a disable alarm does nothing, even if we arm it.
 TEST(WatchdogTest, ConstructorDisabledTest) {
   WatchdogCounter watchdog(TimeDelta::FromMilliseconds(10), "Disabled", false);
   watchdog.Arm();
   // Alarm should not fire, as it was disabled.
@@ skipping 16 matching lines @@
   watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(2));
   // It should almost instantly go off, but certainly in less than a second.
   SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromSeconds(1),
                                    watchdog.alarm_counter() > 0);
 
   EXPECT_EQ(1, watchdog.alarm_counter());
 }
 
 }  // namespace