[chrome/test] favor DCHECK_CURRENTLY_ON for better logs

chrome/test/base/testing_io_thread_state.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 "chrome/test/base/testing_io_thread_state.h"
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/run_loop.h"
 #include "base/time/tick_clock.h"
 #include "chrome/browser/io_thread.h"
@@ skipping 61 matching lines @@
 
   io_thread_state_.reset();
 
 #if defined(OS_CHROMEOS)
   chromeos::NetworkHandler::Shutdown();
   chromeos::DBusThreadManager::Shutdown();
 #endif
 }
 
 void TestingIOThreadState::Initialize(const base::Closure& done) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   io_thread_state_->SetGlobalsForTesting(new IOThread::Globals());
 
   done.Run();
 }
 
 void TestingIOThreadState::Shutdown(const base::Closure& done) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   delete io_thread_state_->globals();
   io_thread_state_->SetGlobalsForTesting(NULL);
   done.Run();
 }
 
 }  // namespace chrome