Replace Increment/DecrementKeepAliveCount by ScopedKeepAlives

chrome/browser/chromeos/login/ui/login_display_host_impl.h

Index: chrome/browser/chromeos/login/ui/login_display_host_impl.h
diff --git a/chrome/browser/chromeos/login/ui/login_display_host_impl.h b/chrome/browser/chromeos/login/ui/login_display_host_impl.h
index 45b3f70256e450694aa96d8e7f282de9dcfbb26f..e4063c4a7f71da5c36f5d7b0b60b80a139bba0c3 100644
--- a/chrome/browser/chromeos/login/ui/login_display_host_impl.h
+++ b/chrome/browser/chromeos/login/ui/login_display_host_impl.h
@@ -35,6 +35,7 @@
 #include "ui/wm/public/scoped_drag_drop_disabler.h"
 
 class PrefService;
+class ScopedKeepAlive;
 
 namespace content {
 class RenderFrameHost;
@@ -218,6 +219,9 @@ class LoginDisplayHostImpl : public LoginDisplayHost,
   // Demo app launcher.
   scoped_ptr<DemoAppLauncher> demo_app_launcher_;
 
+  // Make sure chrome won't exit while we are at login/oobe screen.
+  scoped_ptr<ScopedKeepAlive> keep_alive_;
+
   // Has ShutdownDisplayHost() already been called?  Used to avoid posting our
   // own deletion to the message loop twice if the user logs out while we're
   // still in the process of cleaning up after login (http://crbug.com/134463).