Convert DLOG/DVLOG messages in chrome.dial to VLOG.

chrome/browser/extensions/api/dial/dial_api.cc

Index: chrome/browser/extensions/api/dial/dial_api.cc
diff --git a/chrome/browser/extensions/api/dial/dial_api.cc b/chrome/browser/extensions/api/dial/dial_api.cc
index f9a95390e67629d17a47d329b5fff0acd6914a3c..14b843c186ea1c799b285fc2daca80bc41a88cd2 100644
--- a/chrome/browser/extensions/api/dial/dial_api.cc
+++ b/chrome/browser/extensions/api/dial/dial_api.cc
@@ -72,13 +72,13 @@ void DialAPI::OnListenerRemoved(const EventListenerInfo& details) {
 
 void DialAPI::NotifyListenerAddedOnIOThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  VLOG(1) << "DIAL device event listener added.";
+  VLOG(2) << "DIAL device event listener added.";
   dial_registry()->OnListenerAdded();
 }
 
 void DialAPI::NotifyListenerRemovedOnIOThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  VLOG(1) << "DIAL device event listener removed";
+  VLOG(2) << "DIAL device event listener removed";
   dial_registry()->OnListenerRemoved();
 }