Implement ComplexFeature to support permission features with multiple rules.

chrome/common/extensions/features/manifest_feature.cc

Index: chrome/common/extensions/features/manifest_feature.cc
diff --git a/chrome/common/extensions/features/manifest_feature.cc b/chrome/common/extensions/features/manifest_feature.cc
index 5d7c5a44f09f60978dea4321ca2882c7acba659a..28406d8fecacb2f006413a9d2315e6ea3c61ad7f 100644
--- a/chrome/common/extensions/features/manifest_feature.cc
+++ b/chrome/common/extensions/features/manifest_feature.cc
@@ -18,9 +18,9 @@ Feature::Availability ManifestFeature::IsAvailableToContext(
     const Extension* extension,
     Feature::Context context,
     Feature::Platform platform) const {
-  Availability availability = Feature::IsAvailableToContext(extension,
-                                                            context,
-                                                            platform);
+  Availability availability = SimpleFeature::IsAvailableToContext(extension,
+                                                                  context,
+                                                                  platform);
   if (!availability.is_available())
     return availability;