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

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

Index: chrome/browser/extensions/api/storage/policy_value_store.cc
diff --git a/chrome/browser/extensions/api/storage/policy_value_store.cc b/chrome/browser/extensions/api/storage/policy_value_store.cc
index 9691e2bf01c832a43b7e6db4d6c8710d2d7858f6..f5da68205785a23105b728cac0fa2feef3c39eba 100644
--- a/chrome/browser/extensions/api/storage/policy_value_store.cc
+++ b/chrome/browser/extensions/api/storage/policy_value_store.cc
@@ -57,17 +57,6 @@
   // must be removed.
   base::DictionaryValue previous_policy;
   ValueStore::ReadResult read_result = delegate_->Get();
-
-  // If the database is corrupted, try to restore it.
-  // This may have the unfortunate side-effect of incorrectly informing the
-  // extension of a "new" key, which isn't new and was corrupted. Unfortunately,
-  // there's not always a way around this - if the database is corrupted, there
-  // may be no way of telling which keys were previously present.
-  if (read_result->IsCorrupted()) {
-    if (delegate_->Restore())
-      read_result = delegate_->Get();
-  }
-
   if (read_result->HasError()) {
     LOG(WARNING) << "Failed to read managed settings for extension "
         << extension_id_ << ": " << read_result->error().message;
@@ -172,10 +161,4 @@
   return MakeWriteResult(ReadOnlyError(util::NoKey()));
 }
 
-bool PolicyValueStore::Restore() { return delegate_->Restore(); }
-
-bool PolicyValueStore::RestoreKey(const std::string& key) {
-  return delegate_->RestoreKey(key);
-}
-
 }  // namespace extensions