Replace BrowserProces::AddRefModule/RemoveModule by ScopedKeepAlive

chrome/browser/lifetime/application_lifetime.h

Index: chrome/browser/lifetime/application_lifetime.h
diff --git a/chrome/browser/lifetime/application_lifetime.h b/chrome/browser/lifetime/application_lifetime.h
index 77af41887a48c7d5d5dedb907e75346a0b54f677..1300b2204de9201b3ec5aba3d621aa2979c73135 100644
--- a/chrome/browser/lifetime/application_lifetime.h
+++ b/chrome/browser/lifetime/application_lifetime.h
@@ -58,8 +58,7 @@ void CloseAllBrowsers();
 
 // If there are no browsers open and we aren't already shutting down,
 // initiate a shutdown. Also skips shutdown if this is a unit test.
-// (MessageLoop::current() == null or explicitly disabled).
-void CloseAllBrowsersIfNeeded();
+void ShutdownIfNeeded();
 
 // Begins shutdown of the application when the desktop session is ending.
 void SessionEnding();