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

extensions/browser/api/dns/dns_api.cc

Index: extensions/browser/api/dns/dns_api.cc
diff --git a/extensions/browser/api/dns/dns_api.cc b/extensions/browser/api/dns/dns_api.cc
index 43ffc323df1caed9a8970b26b68341cdc3bdda36..a3a7eb1498d08586f1eb2ebf024bc646f890768e 100644
--- a/extensions/browser/api/dns/dns_api.cc
+++ b/extensions/browser/api/dns/dns_api.cc
@@ -46,7 +46,7 @@ bool DnsResolveFunction::RunImpl() {
 }
 
 void DnsResolveFunction::WorkOnIOThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   net::HostResolver* host_resolver =
       HostResolverWrapper::GetInstance()->GetHostResolver(
@@ -76,7 +76,7 @@ void DnsResolveFunction::WorkOnIOThread() {
 }
 
 void DnsResolveFunction::RespondOnUIThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   SendResponse(response_);
 }