Enable _api_features.json to block APIs from service worker contexts.

chrome/common/extensions/features/simple_feature.h

 // Copyright (c) 2012 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 CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_
 #define CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 69 matching lines @@
                                             Platform platform) const OVERRIDE;
 
   virtual std::string GetAvailabilityMessage(AvailabilityResult result,
                                              Manifest::Type type,
                                              const GURL& url,
                                              Context context) const OVERRIDE;
 
   virtual std::set<Context>* GetContexts() OVERRIDE;
 
   virtual bool IsInternal() const OVERRIDE;
+  virtual bool IsBlockedInServiceWorker() const OVERRIDE;
 
   virtual bool IsIdInWhitelist(const std::string& extension_id) const OVERRIDE;
   static bool IsIdInWhitelist(const std::string& extension_id,
                               const std::set<std::string>& whitelist);
 
  protected:
   Availability CreateAvailability(AvailabilityResult result) const;
   Availability CreateAvailability(AvailabilityResult result,
                                   Manifest::Type type) const;
   Availability CreateAvailability(AvailabilityResult result,
@@ skipping 17 matching lines @@
   chrome::VersionInfo::Channel channel_;
   bool has_parent_;
   bool channel_has_been_set_;
 
   FRIEND_TEST_ALL_PREFIXES(ExtensionSimpleFeatureTest, Context);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_FEATURES_SIMPLE_FEATURE_H_