Add dvlog_always_on to enable DVLOG without DEBUG and DCHECK option

base/message_loop/incoming_task_queue.cc

 // Copyright 2013 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.
 
 #include "base/message_loop/incoming_task_queue.h"
 
 #include <limits>
 #include <utility>
 
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 
 namespace base {
 namespace internal {
 
 namespace {
 
-#if DCHECK_IS_ON()
+#if DCHECK_IS_ON() || DVLOG_IS_ON()
 // Delays larger than this are often bogus, and a warning should be emitted in
 // debug builds to warn developers.  http://crbug.com/450045
 const int kTaskDelayWarningThresholdInSeconds =
     14 * 24 * 60 * 60;  // 14 days.
-#endif
+#endif                  // DCHECK_IS_ON() || DVLOG_IS_ON()
 
 // Returns true if MessagePump::ScheduleWork() must be called one
 // time for every task that is added to the MessageLoop incoming queue.
 bool AlwaysNotifyPump(MessageLoop::Type type) {
 #if defined(OS_ANDROID)
   // The Android UI message loop needs to get notified each time a task is
   // added
   // to the incoming queue.
   return type == MessageLoop::TYPE_UI || type == MessageLoop::TYPE_JAVA;
 #else
@@ skipping 157 matching lines @@
   // that wants to post a task will be blocked until this thread switches back
   // in and releases |incoming_queue_lock_|.
   if (schedule_work)
     message_loop_->ScheduleWork();
 
   return true;
 }
 
 }  // namespace internal
 }  // namespace base