Pass highest handled invalidation version between invalidators

chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h

Index: chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h
diff --git a/chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h b/chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h
index 7243640bb01c5781ce1c3121fb5fdc066a0c35a4..4ab0d45984c5b28b6bc44ed40fe145b1d3e5322d 100644
--- a/chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h
+++ b/chrome/browser/chromeos/policy/device_cloud_policy_invalidator.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_CLOUD_POLICY_INVALIDATOR_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_CLOUD_POLICY_INVALIDATOR_H_
 
+#include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ -88,6 +89,9 @@ class DeviceCloudPolicyInvalidator : public content::NotificationObserver {
   // if no |CloudPolicyInvalidator| exists.
   invalidation::InvalidationService* invalidation_service_;
 
+  // The highest invalidation version that was handled already.
+  int64 highest_handled_invalidation_version_;
+
   // The current |CloudPolicyInvalidator|. NULL if no connected invalidation
   // service is available.
   scoped_ptr<CloudPolicyInvalidator> invalidator_;