Support API aliases

extensions/common/features/simple_feature.cc

Index: extensions/common/features/simple_feature.cc
diff --git a/extensions/common/features/simple_feature.cc b/extensions/common/features/simple_feature.cc
index b30ba4f8e4d7f6953fcee849cf54131fba3d545a..f2260f19976cf06627cdbe05ce298fd95ea9a9b1 100644
--- a/extensions/common/features/simple_feature.cc
+++ b/extensions/common/features/simple_feature.cc
@@ -273,6 +273,14 @@ Feature::Availability SimpleFeature::IsAvailableToManifest(
                                       platform));
 }
 
+std::string SimpleFeature::GetAlias() const {
+  return alias_;
+}
+
+std::string SimpleFeature::GetSource() const {
+  return source_;
+}
+
 Feature::Availability SimpleFeature::IsAvailableToContext(
     const Extension* extension,
     Feature::Context context,
@@ -566,4 +574,11 @@ void SimpleFeature::set_whitelist(
   whitelist_.assign(whitelist.begin(), whitelist.end());
 }
 
+void SimpleFeature::set_alias(base::StringPiece alias) {
+  alias_ = alias.as_string();
+}
+
+void SimpleFeature::set_source(base::StringPiece source) {
+  source_ = source.as_string();
+}
 }  // namespace extensions