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

chrome/common/extensions/features/simple_feature.cc

 // 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.
 
 #include "chrome/common/extensions/features/simple_feature.h"
 
 #include <map>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 475 matching lines @@
 
 std::set<Feature::Context>* SimpleFeature::GetContexts() {
   return &contexts_;
 }
 
 bool SimpleFeature::IsInternal() const {
   NOTREACHED();
   return false;
 }
 
+bool SimpleFeature::IsBlockedInServiceWorker() const { return false; }
+
 bool SimpleFeature::IsIdInWhitelist(const std::string& extension_id) const {
   return IsIdInWhitelist(extension_id, whitelist_);
 }
 
 // static
 bool SimpleFeature::IsIdInWhitelist(const std::string& extension_id,
                                     const std::set<std::string>& whitelist) {
   // Belt-and-suspenders philosophy here. We should be pretty confident by this
   // point that we've validated the extension ID format, but in case something
   // slips through, we avoid a class of attack where creative ID manipulation
   // leads to hash collisions.
   if (extension_id.length() != 32)  // 128 bits / 4 = 32 mpdecimal characters
     return false;
 
   if (whitelist.find(extension_id) != whitelist.end() ||
       whitelist.find(HashExtensionId(extension_id)) != whitelist.end()) {
     return true;
   }
 
   return false;
 }
 
 }  // namespace extensions