Pass a Feature* to IsAnyFeatureAvailableToContext instead of a string name.

extensions/common/extension_api.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_EXTENSION_API_H_
 #define EXTENSIONS_COMMON_EXTENSION_API_H_
 
 #include <map>
 #include <string>
 
@@ skipping 58 matching lines @@
   // either a namespace name (like "bookmarks") or a member name (like
   // "bookmarks.create"). Returns true if the feature and all of its
   // dependencies are available to the specified context.
   Feature::Availability IsAvailable(const std::string& api_full_name,
                                     const Extension* extension,
                                     Feature::Context context,
                                     const GURL& url);
 
   // Determines whether an API, or any parts of that API, are available in
   // |context|.
-  bool IsAnyFeatureAvailableToContext(const std::string& api_name,
+  bool IsAnyFeatureAvailableToContext(const Feature& api,
                                       const Extension* extension,
                                       Feature::Context context,
                                       const GURL& url);
 
   // Returns true if |name| is a privileged API path. Privileged paths can only
   // be called from extension code which is running in its own designated
   // extension process. They cannot be called from extension code running in
   // content scripts, or other low-privileged contexts.
   bool IsPrivileged(const std::string& name);
 
@@ skipping 42 matching lines @@
   // FeatureProviders used for resolving dependencies.
   typedef std::map<std::string, FeatureProvider*> FeatureProviderMap;
   FeatureProviderMap dependency_providers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAPI);
 };
 
 } // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSION_API_H_