Refresh policies from DM server periodically

chrome/browser/policy/mock_device_management_backend.h

Index: chrome/browser/policy/mock_device_management_backend.h
diff --git a/chrome/browser/policy/mock_device_management_backend.h b/chrome/browser/policy/mock_device_management_backend.h
index f0612f408cc20fb566d71c6e3ac2d6b26f4752e3..45a4b43c076bcd3ad2fb133cc686bb008ce30ddd 100644
--- a/chrome/browser/policy/mock_device_management_backend.h
+++ b/chrome/browser/policy/mock_device_management_backend.h
@@ -11,8 +11,8 @@
 
 #include "base/values.h"
 #include "chrome/browser/policy/device_management_backend.h"
-#include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
 
 namespace policy {
 
@@ -47,6 +47,8 @@ class MockDeviceManagementBackend
   void AllShouldSucceed();
   void AllShouldFail();
   void UnmanagedDevice();
+  void RegisterFailsOncePolicyFailsTwice();
+  void AllWorksFirstPolicyFailsLater();
 
   void SimulateSuccessfulRegisterRequest(
       const std::string& auth_token,
@@ -82,6 +84,13 @@ class MockDeviceManagementBackend
   em::DevicePolicyResponse policy_response_;
   em::DevicePolicySetting* policy_setting_;
 
+  bool policy_works_later_;
+  int policy_remaining_fail_count_;
+  bool register_works_later_;
+  int register_remaining_fail_count_;
+  bool policy_fails_later_;
+  int policy_remaining_success_count_;
+
   DISALLOW_COPY_AND_ASSIGN(MockDeviceManagementBackend);
 };