Extensions: Only create Web request rules registry if Declarative Web Request is enabled.

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;
 }
 
+Feature::Availability ComplexFeature::IsAvailableToChannel(
+    version_info::Channel channel) const {
+  Feature::Availability first_availability =
+      features_[0]->IsAvailableToChannel(channel);
+  if (first_availability.is_available())
+    return first_availability;
+
+  for (FeatureList::const_iterator it = features_.begin() + 1;
+       it != features_.end(); ++it) {
+    Availability availability = (*it)->IsAvailableToChannel(channel);
+    if (availability.is_available())
+      return availability;
+  }
+  // If none of the SimpleFeatures are available, we return the availability
+  // info of the first SimpleFeature that was not available.
+  return first_availability;
+}
+
 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