Changing inheritance to composition.

chrome/common/extensions/features/manifest_feature.h

Index: chrome/common/extensions/features/manifest_feature.h
diff --git a/chrome/common/extensions/features/manifest_feature.h b/chrome/common/extensions/features/manifest_feature.h
index 0ec0cd72b742f698351bc6d799ba53701cc3949e..7d1c74f7110a07b9382f9bd8a02ffd5bd2a149c2 100644
--- a/chrome/common/extensions/features/manifest_feature.h
+++ b/chrome/common/extensions/features/manifest_feature.h
@@ -11,13 +11,16 @@ namespace extensions {
 
 class ManifestFeature : public Feature {
  public:
-  ManifestFeature();
+  explicit ManifestFeature(scoped_ptr<Feature> feature);
   virtual ~ManifestFeature();
 
   virtual Feature::Availability IsAvailableToContext(
       const Extension* extension,
       Feature::Context context,
       Feature::Platform platform) const OVERRIDE;
+
+ private:
+  scoped_ptr<Feature> feature_;
 };
 
 }  // extensions