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 59ecee06fdc178be460bce61a824d501ed929695..2073373d8b1e1bde0edbf970c9cb8f17a01ac408 100644
--- a/chrome/browser/chrome_to_mobile_service.cc
+++ b/chrome/browser/chrome_to_mobile_service.cc
@@ -478,6 +478,16 @@ void ChromeToMobileService::OnIncomingInvalidation(
   DCHECK_EQ(1U, invalidation_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) {
+    // TODO(dcheng): Only acknowledge the invalidation once the device search
+    // has finished. http://crbug.com/156843.
+    profile_sync_service->AcknowledgeInvalidation(
+        invalidation_map.begin()->first,
+        invalidation_map.begin()->second.ack_handle);
+  }
   RequestDeviceSearch();
 }