Revert of [GCM] Fetching OAuth2 tokens periodically in account tracker

components/gcm_driver/gcm_client_impl.cc

Index: components/gcm_driver/gcm_client_impl.cc
diff --git a/components/gcm_driver/gcm_client_impl.cc b/components/gcm_driver/gcm_client_impl.cc
index 4a68dc0766f61c76c492fc5eeb1976109f1ef0f4..8fe3df7fb4eef2c0e033a5dee4f5e0ad439089d6 100644
--- a/components/gcm_driver/gcm_client_impl.cc
+++ b/components/gcm_driver/gcm_client_impl.cc
@@ -474,7 +474,7 @@
 void GCMClientImpl::SetLastTokenFetchTime(const base::Time& time) {
   gcm_store_->SetLastTokenFetchTime(
       time,
-      base::Bind(&GCMClientImpl::IgnoreWriteResultCallback,
+      base::Bind(&GCMClientImpl::DefaultStoreCallback,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
@@ -597,11 +597,6 @@
   DCHECK(success);
 }
 
-void GCMClientImpl::IgnoreWriteResultCallback(bool success) {
-  // TODO(fgorski): Ignoring the write result for now to make sure
-  // sync_intergration_tests are not broken.
-}
-
 void GCMClientImpl::Stop() {
   DVLOG(1) << "Stopping the GCM Client";
   weak_ptr_factory_.InvalidateWeakPtrs();