Replace DCHECK(BrowserThread::CurrentlyOn) with DCHECK_CURRENTLY_ON in extensions.

chrome/browser/extensions/extension_messages_apitest.cc

Index: chrome/browser/extensions/extension_messages_apitest.cc
diff --git a/chrome/browser/extensions/extension_messages_apitest.cc b/chrome/browser/extensions/extension_messages_apitest.cc
index 2157e07c67ccfe50742460ede08ac4850ca0bc91..047e232720744da19f196e143566c6d9f7143bdb 100644
--- a/chrome/browser/extensions/extension_messages_apitest.cc
+++ b/chrome/browser/extensions/extension_messages_apitest.cc
@@ -777,7 +777,7 @@ class ExternallyConnectableMessagingWithTlsChannelIdTest :
       std::string* domain_bound_cert,
       net::ServerBoundCertService::RequestHandle* request_handle,
       scoped_refptr<net::URLRequestContextGetter> request_context_getter) {
-    DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
     net::ServerBoundCertService* server_bound_cert_service =
         request_context_getter->GetURLRequestContext()->
             server_bound_cert_service();