[GCM] Exposing persistence of account mappings in GCM Driver

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 b5240f95ea4ca1c85f89b218d350948a7c22a0b0..02ea2326fc055d2d0195123c957e87549cb1557f 100644
--- a/components/gcm_driver/gcm_client_impl.cc
+++ b/components/gcm_driver/gcm_client_impl.cc
@@ -469,6 +469,20 @@ void GCMClientImpl::SetAccountsForCheckin(
   }
 }
 
+void GCMClientImpl::UpdateAccountMapping(
+    const AccountMapping& account_mapping) {
+  gcm_store_->AddAccountMapping(account_mapping,
+                                base::Bind(&GCMClientImpl::DefaultStoreCallback,
+                                           weak_ptr_factory_.GetWeakPtr()));
+}
+
+void GCMClientImpl::RemoveAccountMapping(const std::string& account_id) {
+  gcm_store_->RemoveAccountMapping(
+      account_id,
+      base::Bind(&GCMClientImpl::DefaultStoreCallback,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
 void GCMClientImpl::StartCheckin() {
   // Make sure no checkin is in progress.
   if (checkin_request_.get())
@@ -584,6 +598,10 @@ void GCMClientImpl::UpdateRegistrationCallback(bool success) {
   DCHECK(success);
 }
 
+void GCMClientImpl::DefaultStoreCallback(bool success) {
+  DCHECK(success);
+}
+
 void GCMClientImpl::Stop() {
   weak_ptr_factory_.InvalidateWeakPtrs();
   device_checkin_info_.Reset();