Use DCHECKs when observing only a single notification.

chrome/browser/download/download_request_limiter.cc

Index: chrome/browser/download/download_request_limiter.cc
diff --git a/chrome/browser/download/download_request_limiter.cc b/chrome/browser/download/download_request_limiter.cc
index dd1980d1455eebf82b158966f08121c6edaa7e18..8f2fceb30066b678c8e48ac030d4125d19474291 100644
--- a/chrome/browser/download/download_request_limiter.cc
+++ b/chrome/browser/download/download_request_limiter.cc
@@ -222,7 +222,7 @@ void DownloadRequestLimiter::TabDownloadState::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  DCHECK(type == chrome::NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED);
+  DCHECK_EQ(chrome::NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED, type);
 
   // Content settings have been updated for our web contents, e.g. via the OIB
   // or the settings page. Check to see if the automatic downloads setting is