Use DCHECKs when observing only a single notification.

chrome/browser/geolocation/geolocation_permission_context_unittest.cc

Index: chrome/browser/geolocation/geolocation_permission_context_unittest.cc
diff --git a/chrome/browser/geolocation/geolocation_permission_context_unittest.cc b/chrome/browser/geolocation/geolocation_permission_context_unittest.cc
index d3d295157d85cfcbc828f7507d6ea0396ca48453..4779afc57222f62d70625b4f42852669df5043f6 100644
--- a/chrome/browser/geolocation/geolocation_permission_context_unittest.cc
+++ b/chrome/browser/geolocation/geolocation_permission_context_unittest.cc
@@ -24,7 +24,6 @@
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
-#include "chrome/browser/geolocation/geolocation_permission_context.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 #include "chrome/browser/permissions/permission_manager.h"
@@ -103,7 +102,7 @@ void ClosedInfoBarTracker::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  DCHECK(type == chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED);
+  DCHECK_EQ(chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED, type);
   removed_infobars_.insert(
       content::Details<infobars::InfoBar::RemovedDetails>(details)->first);
 }