Clean up retry-delay-time code.

chrome/browser/chromeos/arc/policy/arc_android_management_checker.h

Index: chrome/browser/chromeos/arc/policy/arc_android_management_checker.h
diff --git a/chrome/browser/chromeos/arc/policy/arc_android_management_checker.h b/chrome/browser/chromeos/arc/policy/arc_android_management_checker.h
index b72641eaa25a6f60c9f397b90a26aa5e2a4ffcf1..dc50f834d53f73b0c456dff189a8f0725a413428 100644
--- a/chrome/browser/chromeos/arc/policy/arc_android_management_checker.h
+++ b/chrome/browser/chromeos/arc/policy/arc_android_management_checker.h
@@ -9,6 +9,7 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
 #include "chrome/browser/chromeos/policy/android_management_client.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
@@ -51,8 +52,8 @@ class ArcAndroidManagementChecker : public OAuth2TokenService::Observer {
   // retry in foreground mode and result is passed to delegate directly.
   bool background_mode_;
 
-  // Keeps current retry time for background mode.
-  int retry_time_ms_;
+  // Keeps current retry delay.
+  base::TimeDelta retry_delay_;
 
   policy::AndroidManagementClient android_management_client_;