Propagate more information about ValueStore errors to callers, notably an

chrome/browser/extensions/api/storage/settings_backend.cc

Index: chrome/browser/extensions/api/storage/settings_backend.cc
diff --git a/chrome/browser/extensions/api/storage/settings_backend.cc b/chrome/browser/extensions/api/storage/settings_backend.cc
index cd4976a7b4b737c0b4621cd6c0a8204b37de8254..cf6ccad65dbd4ec2bc8173e838e09e2b152e98c7 100644
--- a/chrome/browser/extensions/api/storage/settings_backend.cc
+++ b/chrome/browser/extensions/api/storage/settings_backend.cc
@@ -160,11 +160,10 @@ syncer::SyncDataList SettingsBackend::GetAllSyncData(
     ValueStore::ReadResult maybe_settings = GetStorage(*it)->Get();
     if (maybe_settings->HasError()) {
       LOG(WARNING) << "Failed to get settings for " << *it << ": " <<
-          maybe_settings->error();
+          maybe_settings->error().message;
       continue;
     }
-    AddAllSyncData(*it, *maybe_settings->settings().get(),
-                   type, &all_sync_data);
+    AddAllSyncData(*it, maybe_settings->settings(), type, &all_sync_data);
   }
 
   return all_sync_data;