Pass highest handled invalidation version between invalidators

chrome/browser/policy/cloud/cloud_policy_invalidator.h

Index: chrome/browser/policy/cloud/cloud_policy_invalidator.h
diff --git a/chrome/browser/policy/cloud/cloud_policy_invalidator.h b/chrome/browser/policy/cloud/cloud_policy_invalidator.h
index 6653a5d305eafa5bfdeb5c7b5ed033c33871e19c..7033c138dafb3b854d75202d74950af5ee61c3f5 100644
--- a/chrome/browser/policy/cloud/cloud_policy_invalidator.h
+++ b/chrome/browser/policy/cloud/cloud_policy_invalidator.h
@@ -64,11 +64,14 @@ class CloudPolicyInvalidator : public syncer::InvalidationHandler,
   // |task_runner| is used for scheduling delayed tasks. It must post tasks to
   // the main policy thread.
   // |clock| is used to get the current time.
+  // |highest_handled_invalidation_version| is the highest invalidation version
+  // that was handled already before this invalidator was created.
   CloudPolicyInvalidator(
       enterprise_management::DeviceRegisterRequest::Type type,
       CloudPolicyCore* core,
       const scoped_refptr<base::SequencedTaskRunner>& task_runner,
-      scoped_ptr<base::Clock> clock);
+      scoped_ptr<base::Clock> clock,
+      int64 highest_handled_invalidation_version);
   virtual ~CloudPolicyInvalidator();
 
   // Initializes the invalidator. No invalidations will be generated before this
@@ -86,6 +89,11 @@ class CloudPolicyInvalidator : public syncer::InvalidationHandler,
     return invalidations_enabled_;
   }
 
+  // The highest invalidation version that was handled already.
+  int64 highest_handled_invalidation_version() const {
+    return highest_handled_invalidation_version_;
+  }
+
   // syncer::InvalidationHandler:
   virtual void OnInvalidatorStateChange(
       syncer::InvalidatorState state) OVERRIDE;
@@ -207,6 +215,9 @@ class CloudPolicyInvalidator : public syncer::InvalidationHandler,
   // invalidation_version_ when such invalidations occur.
   int unknown_version_invalidation_count_;
 
+  // The highest invalidation version that was handled already.
+  int64 highest_handled_invalidation_version_;
+
   // The most up to date invalidation.
   scoped_ptr<syncer::Invalidation> invalidation_;