A few source code cosmetics for notifications.

chrome/browser/extensions/api/notifications/notifications_api.cc

Index: chrome/browser/extensions/api/notifications/notifications_api.cc
diff --git a/chrome/browser/extensions/api/notifications/notifications_api.cc b/chrome/browser/extensions/api/notifications/notifications_api.cc
index 8bd5aee431d1acd4242d6d9af0cd317c1535ace8..6d2f5e1738486e4678c7983d03a21cb034d03d06 100644
--- a/chrome/browser/extensions/api/notifications/notifications_api.cc
+++ b/chrome/browser/extensions/api/notifications/notifications_api.cc
@@ -253,7 +253,7 @@ NotificationsApiFunction::~NotificationsApiFunction() {
 bool NotificationsApiFunction::CreateNotification(
     const std::string& id,
     api::notifications::NotificationOptions* options) {
-  // First, make sure the required fields exist: type, title, message,  icon.
+  // First, make sure the required fields exist: type, title, message, icon.
   // These fields are defined as optional in IDL such that they can be used as
   // optional for notification updates. But for notification creations, they
   // should be present.