Implement Invalidator::Acknowledge

chrome/browser/chrome_to_mobile_service.cc

Index: chrome/browser/chrome_to_mobile_service.cc
diff --git a/chrome/browser/chrome_to_mobile_service.cc b/chrome/browser/chrome_to_mobile_service.cc
index 58435a8efa0d24c7698b9f8654087f383a61e7d7..790ffada1ac7c48a9b71ddeb7131c629a2748e36 100644
--- a/chrome/browser/chrome_to_mobile_service.cc
+++ b/chrome/browser/chrome_to_mobile_service.cc
@@ -409,6 +409,13 @@ void ChromeToMobileService::OnIncomingInvalidation(
   DCHECK_EQ(1U, id_state_map.count(invalidation::ObjectId(
       ipc::invalidation::ObjectSource::CHROME_COMPONENTS,
       kSyncInvalidationObjectIdChromeToMobileDeviceList)));
+  // TODO(msw): Unit tests do not provide profiles; see http://crbug.com/122183
+  ProfileSyncService* profile_sync_service =
+      profile_ ? ProfileSyncServiceFactory::GetForProfile(profile_) : NULL;
+  if (profile_sync_service) {
+    profile_sync_service->AcknowledgeInvalidation(
+        id_state_map.begin()->first, id_state_map.begin()->second.ack_handle);
+  }
   RequestDeviceSearch();
 }