Lazily load API schemas from resource files and convert all APIs to features

chrome/common/extensions/features/feature.h

Index: chrome/common/extensions/features/feature.h
diff --git a/chrome/common/extensions/features/feature.h b/chrome/common/extensions/features/feature.h
index ef7a6e6d5705d0a358a89e54369877bffcf92ffe..6a5093634b1b44a6964cfcbd8fa4d9ab5bcbad98 100644
--- a/chrome/common/extensions/features/feature.h
+++ b/chrome/common/extensions/features/feature.h
@@ -138,6 +138,9 @@ class Feature {
   // Tests whether this is an internal API or not.
   virtual bool IsInternal() const = 0;
 
+  // Tests whether this Feature has a parent Feature.
+  virtual bool HasParent() const = 0;
+
   // Returns true if the feature is available to be parsed into a new extension
   // manifest.
   Availability IsAvailableToManifest(const std::string& extension_id,