[GCM] Cleanup for ios enabling

chrome/browser/invalidation/ticl_invalidation_service.cc

Index: chrome/browser/invalidation/ticl_invalidation_service.cc
diff --git a/chrome/browser/invalidation/ticl_invalidation_service.cc b/chrome/browser/invalidation/ticl_invalidation_service.cc
index 3539110c7a340e64f4ee086ebeefd5d746119225..eb5f33062e46908c215ca41683b8418fb9f07c52 100644
--- a/chrome/browser/invalidation/ticl_invalidation_service.cc
+++ b/chrome/browser/invalidation/ticl_invalidation_service.cc
@@ -429,8 +429,6 @@ void TiclInvalidationService::StartInvalidator(
 
 void TiclInvalidationService::UpdateInvalidationNetworkChannel() {
   InvalidationNetworkChannel network_channel_type = PUSH_CLIENT_CHANNEL;
-// For now don't use GCM on iOS.
-#if !defined(OS_IOS)
   if (gcm::GCMProfileService::GetGCMEnabledState(profile_) ==
           gcm::GCMProfileService::ALWAYS_ENABLED &&
       (profile_->GetPrefs()->GetBoolean(
@@ -439,7 +437,6 @@ void TiclInvalidationService::UpdateInvalidationNetworkChannel() {
            switches::kInvalidationUseGCMChannel))) {
     network_channel_type = GCM_NETWORK_CHANNEL;
   }
-#endif
   if (network_channel_type_ == network_channel_type)
     return;
   network_channel_type_ = network_channel_type;