FeatureProvider returns std::map instead of vector

extensions/common/features/feature_provider.h

Index: extensions/common/features/feature_provider.h
diff --git a/extensions/common/features/feature_provider.h b/extensions/common/features/feature_provider.h
index 40d8ab84f6d8cf19b69ffd62116ed92b162a9542..ae975137b508e845f81fca7498652006bf2bcaa3 100644
--- a/extensions/common/features/feature_provider.h
+++ b/extensions/common/features/feature_provider.h
@@ -5,13 +5,18 @@
 #ifndef EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
 #define EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
 
+#include <map>
 #include <string>
 #include <vector>
 
+#include "base/memory/scoped_ptr.h"
+
 namespace extensions {
 
 class Feature;
 
+using FeatureMap = std::map<std::string, scoped_ptr<Feature>>;
+
 // Implemented by classes that can vend features.
 class FeatureProvider {
  public:
@@ -52,8 +57,8 @@ class FeatureProvider {
   // Returns the features inside the |parent| namespace, recursively.
   virtual std::vector<Feature*> GetChildren(const Feature& parent) const = 0;
 
-  // Returns all features described by this instance, in asciibetical order.
-  virtual const std::vector<std::string>& GetAllFeatureNames() const = 0;
+  // Returns a map containing all features described by this instance.
+  virtual const FeatureMap& GetAllFeatures() const = 0;
 };
 
 }  // namespace extensions