Removed NOTIFICATION_BROWSER_CLOSING notification

chrome/browser/ui/tabs/pinned_tab_service.h

Index: chrome/browser/ui/tabs/pinned_tab_service.h
diff --git a/chrome/browser/ui/tabs/pinned_tab_service.h b/chrome/browser/ui/tabs/pinned_tab_service.h
index f1dc573b8cf7e9da006053201dc3da8fdcc26593..2cd3e5d530fa36fc9d1fb1fec2f6231e61a0b731 100644
--- a/chrome/browser/ui/tabs/pinned_tab_service.h
+++ b/chrome/browser/ui/tabs/pinned_tab_service.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -17,6 +18,7 @@ class Profile;
 // pinned tabs to restore at startup. PinnedTabService listens for the
 // appropriate set of notifications to know it should update preferences.
 class PinnedTabService : public content::NotificationObserver,
+                         public chrome::BrowserListObserver,
                          public KeyedService {
  public:
   explicit PinnedTabService(Profile* profile);
@@ -27,6 +29,9 @@ class PinnedTabService : public content::NotificationObserver,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
+  // chrome::BrowserListObserver:
+  void OnBrowserCloseStarted(Browser* browser) override;
+
   Profile* profile_;
 
   // True if we should save the pinned tabs when a browser window closes or the