Remove GetContexts() from the public interface of extensions::Feature. It was

extensions/common/features/feature.h

 // Copyright 2013 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.
 
 #ifndef EXTENSIONS_COMMON_FEATURES_FEATURE_H_
 #define EXTENSIONS_COMMON_FEATURES_FEATURE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 90 matching lines @@
   static Availability CreateAvailability(AvailabilityResult result,
                                          const std::string& message);
 
   const std::string& name() const { return name_; }
   void set_name(const std::string& name) { name_ = name; }
   bool no_parent() const { return no_parent_; }
 
   // Gets the platform the code is currently running on.
   static Platform GetCurrentPlatform();
 
-  virtual std::set<Context>* GetContexts() = 0;
-
   // Tests whether this is an internal API or not.
   virtual bool IsInternal() const = 0;
 
   // Returns True for features excluded from service worker backed contexts.
   virtual bool IsBlockedInServiceWorker() const = 0;
 
   // Returns true if the feature is available to be parsed into a new extension
   // manifest.
   Availability IsAvailableToManifest(const std::string& extension_id,
                                      Manifest::Type type,
@@ skipping 32 matching lines @@
   virtual bool IsIdInWhitelist(const std::string& extension_id) const = 0;
 
  protected:
   std::string name_;
   bool no_parent_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_FEATURES_FEATURE_H_