Implement new invalidations ack tracking system

chrome/browser/invalidation/invalidation_service_android.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_INVALIDATION_INVALIDATION_SERVICE_ANDROID_H_
 #define CHROME_BROWSER_INVALIDATION_INVALIDATION_SERVICE_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 30 matching lines @@
   // Note that this implementation does not properly support Ack-tracking,
   // fetching the invalidator state, or querying the client's ID.  Support for
   // exposing the client ID should be available soon; see crbug.com/172391.
   virtual void RegisterInvalidationHandler(
       syncer::InvalidationHandler* handler) OVERRIDE;
   virtual void UpdateRegisteredInvalidationIds(
       syncer::InvalidationHandler* handler,
       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;
   virtual std::string GetInvalidatorClientId() const OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // The InvalidationServiceAndroid always reports that it is enabled.
   // This is used only by unit tests.
   void TriggerStateChangeForTest(syncer::InvalidatorState state);
 
  private:
   syncer::InvalidatorRegistrar invalidator_registrar_;
   content::NotificationRegistrar registrar_;
   syncer::InvalidatorState invalidator_state_;
   scoped_ptr<InvalidationControllerAndroid> invalidation_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(InvalidationServiceAndroid);
 };
 
 }  // namespace invalidation
 
 #endif  // CHROME_BROWSER_INVALIDATION_INVALIDATION_SERVICE_ANDROID_H_