base: Remove the string logging from CHECK().

extensions/browser/api/alarms/alarm_manager.cc

Index: extensions/browser/api/alarms/alarm_manager.cc
diff --git a/extensions/browser/api/alarms/alarm_manager.cc b/extensions/browser/api/alarms/alarm_manager.cc
index 626c4ce6698f2650ae73c8f28f8ceb788c02c750..442e0993cc268a920d09962c45937180fecd0af8 100644
--- a/extensions/browser/api/alarms/alarm_manager.cc
+++ b/extensions/browser/api/alarms/alarm_manager.cc
@@ -464,9 +464,8 @@ Alarm::Alarm(const std::string& name,
     double* delay_in_minutes = create_info.delay_in_minutes.get();
     if (delay_in_minutes == NULL)
       delay_in_minutes = create_info.period_in_minutes.get();
-    CHECK(delay_in_minutes != NULL)
-        << "ValidateAlarmCreateInfo in alarms_api.cc should have "
-        << "prevented this call.";
+    // ValidateAlarmCreateInfo in alarms_api.cc should have prevented this call.
+    CHECK(delay_in_minutes != NULL);
     base::TimeDelta delay = TimeDeltaFromDelay(*delay_in_minutes);
     js_alarm->scheduled_time = (now + delay).ToJsTime();
     granularity = delay;