favor DCHECK_CURRENTLY_ON for better logs in extensions/

extensions/browser/api/bluetooth_socket/bluetooth_socket_event_dispatcher.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 "extensions/browser/api/bluetooth_socket/bluetooth_socket_event_dispatcher.h"
 
 #include "base/lazy_instance.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_socket.h"
 #include "extensions/browser/api/bluetooth_socket/bluetooth_api_socket.h"
@@ skipping 337 matching lines @@
                  params.browser_context_id,
                  params.extension_id,
                  base::Passed(event.Pass())));
 }
 
 // static
 void BluetoothSocketEventDispatcher::DispatchEvent(
     void* browser_context_id,
     const std::string& extension_id,
     scoped_ptr<Event> event) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   content::BrowserContext* context =
       reinterpret_cast<content::BrowserContext*>(browser_context_id);
   if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
     return;
 
   EventRouter* router = EventRouter::Get(context);
   if (router)
     router->DispatchEventToExtension(extension_id, event.Pass());
 }
 
 }  // namespace core_api
 }  // namespace extensions