Implement Invalidator::Acknowledge

chrome/browser/sync/profile_sync_service.h

Index: chrome/browser/sync/profile_sync_service.h
diff --git a/chrome/browser/sync/profile_sync_service.h b/chrome/browser/sync/profile_sync_service.h
index c48ae6425cef075a4740fb5a6727ba5fc4c426b2..f592a192a4e501a5ab0093e8ef251651b8cea1b1 100644
--- a/chrome/browser/sync/profile_sync_service.h
+++ b/chrome/browser/sync/profile_sync_service.h
@@ -7,6 +7,8 @@
 
 #include <list>
 #include <string>
+#include <utility>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -595,6 +597,10 @@ class ProfileSyncService : public ProfileSyncServiceBase,
       const syncer::ObjectIdSet& ids) OVERRIDE;
   virtual void UnregisterInvalidationHandler(
       syncer::InvalidationHandler* handler) OVERRIDE;
+  virtual void AcknowledgeInvalidation(
+      const invalidation::ObjectId& id,
+      const syncer::AckHandle& ack_handle) OVERRIDE;
+
   virtual syncer::InvalidatorState GetInvalidatorState() const OVERRIDE;
 
   // ProfileKeyedService implementation.  This must be called exactly
@@ -669,6 +675,8 @@ class ProfileSyncService : public ProfileSyncServiceBase,
     ERROR_REASON_ACTIONABLE_ERROR,
     ERROR_REASON_LIMIT
   };
+  typedef std::vector<std::pair<invalidation::ObjectId,
+                                syncer::AckHandle> > AckHandleReplayQueue;
   friend class ProfileSyncServicePasswordTest;
   friend class SyncTest;
   friend class TestProfileSyncService;
@@ -896,6 +904,8 @@ class ProfileSyncService : public ProfileSyncServiceBase,
   // Dispatches invalidations to handlers.  Set in Initialize() and
   // unset in Shutdown().
   scoped_ptr<syncer::InvalidatorRegistrar> invalidator_registrar_;
+  // Queues any acknowledgements received while the backend is uninitialized.
+  AckHandleReplayQueue ack_replay_queue_;
 
   // Sync's internal debug info listener. Used to record datatype configuration
   // and association information.