[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 bd343fc09d3c128f9671ccf4b788385e900519c9..4e0428c8fe079fa4f4876cfe93fc0c6ea616f0a0 100644
--- a/chrome/browser/invalidation/ticl_invalidation_service.cc
+++ b/chrome/browser/invalidation/ticl_invalidation_service.cc
@@ -428,15 +428,12 @@ 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 (profile_->GetPrefs()->GetBoolean(
           prefs::kInvalidationServiceUseGCMChannel) &&
       gcm::GCMProfileService::GetGCMEnabledState(profile_) ==
           gcm::GCMProfileService::ALWAYS_ENABLED) {
     network_channel_type = GCM_NETWORK_CHANNEL;
   }
-#endif
   if (network_channel_type_ == network_channel_type)
     return;
   network_channel_type_ = network_channel_type;