Revert of Add a Restore() method to ValueStore and make StorageAPI use it

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

Index: chrome/browser/extensions/api/storage/syncable_settings_storage.cc
diff --git a/chrome/browser/extensions/api/storage/syncable_settings_storage.cc b/chrome/browser/extensions/api/storage/syncable_settings_storage.cc
index a9df5945e50cd33d115fa77aff1bb31b6db96b69..db877c6882bad8e34362faf01c7b9974e48fd2cc 100644
--- a/chrome/browser/extensions/api/storage/syncable_settings_storage.cc
+++ b/chrome/browser/extensions/api/storage/syncable_settings_storage.cc
@@ -120,28 +120,6 @@
   }
   SyncResultIfEnabled(result);
   return result.Pass();
-}
-
-bool SyncableSettingsStorage::Restore() {
-  // If we're syncing, stop - we don't want to push the deletion of any data.
-  // At next startup, when we start up the sync service, we'll get back any
-  // data which was stored intact on Sync.
-  // TODO (rdevlin.cronin): Investigate if there's a way we can trigger
-  // MergeDataAndStartSyncing() to immediately get back any data we can,
-  // and continue syncing.
-  StopSyncing();
-  return delegate_->Restore();
-}
-
-bool SyncableSettingsStorage::RestoreKey(const std::string& key) {
-  // If we're syncing, stop - we don't want to push the deletion of any data.
-  // At next startup, when we start up the sync service, we'll get back any
-  // data which was stored intact on Sync.
-  // TODO (rdevlin.cronin): Investigate if there's a way we can trigger
-  // MergeDataAndStartSyncing() to immediately get back any data we can,
-  // and continue syncing.
-  StopSyncing();
-  return delegate_->RestoreKey(key);
 }
 
 void SyncableSettingsStorage::SyncResultIfEnabled(