favor DCHECK_CURRENTLY_ON for better logs in content/browser/[q-z]*

content/browser/time_zone_monitor.cc

 // Copyright 2014 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 "content/browser/time_zone_monitor.h"
 
 #include "base/logging.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 
 namespace content {
 
 TimeZoneMonitor::TimeZoneMonitor() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 TimeZoneMonitor::~TimeZoneMonitor() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
 }
 
 void TimeZoneMonitor::NotifyRenderers() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   for (RenderProcessHost::iterator iterator =
            RenderProcessHost::AllHostsIterator();
        !iterator.IsAtEnd();
        iterator.Advance()) {
     iterator.GetCurrentValue()->NotifyTimezoneChange();
   }
 }
 
 }  // namespace content