Support API aliases

extensions/common/features/complex_feature.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/common/features/complex_feature.h"
 
 namespace extensions {
 
 ComplexFeature::ComplexFeature(std::vector<Feature*>* features) {
   DCHECK_GT(features->size(), 0UL);
@@ skipping 80 matching lines @@
 bool ComplexFeature::IsIdInWhitelist(const std::string& extension_id) const {
   for (FeatureList::const_iterator it = features_.begin();
        it != features_.end();
        ++it) {
     if ((*it)->IsIdInWhitelist(extension_id))
       return true;
   }
   return false;
 }
 
+std::string ComplexFeature::GetAlias() const {
+  for (FeatureList::const_iterator it = features_.begin();
+       it != features_.end(); ++it) {
+    std::string alias = (*it)->GetAlias();
+    if (!alias.empty())
+      return alias;
+  }
+
+  return std::string();
+}
+
+std::string ComplexFeature::GetSource() const {
+  for (FeatureList::const_iterator it = features_.begin();
+       it != features_.end(); ++it) {
+    std::string source = (*it)->GetSource();
+    if (!source.empty())
+      return source;
+  }
+
+  return std::string();
+}
+
 bool ComplexFeature::IsInternal() const {
   // Constructor verifies that composed features are consistent, thus we can
   // return just the first feature's value.
   return features_[0]->IsInternal();
 }
 
 }  // namespace extensions