Introduce lock screen app context to extension features

extensions/common/features/simple_feature.cc

 // Copyright 2014 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 "extensions/common/features/simple_feature.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 86 matching lines @@
     case Feature::CONTENT_SCRIPT_CONTEXT:
       return "content script";
     case Feature::WEB_PAGE_CONTEXT:
       return "web page";
     case Feature::BLESSED_WEB_PAGE_CONTEXT:
       return "hosted app";
     case Feature::WEBUI_CONTEXT:
       return "webui";
     case Feature::SERVICE_WORKER_CONTEXT:
       return "service worker";
+    case Feature::LOCK_SCREEN_EXTENSION_CONTEXT:
+      return "lock screen app";
   }
   NOTREACHED();
   return "";
 }
 
 std::string GetDisplayName(version_info::Channel channel) {
   switch (channel) {
     case version_info::Channel::UNKNOWN:
       return "trunk";
     case version_info::Channel::CANARY:
@@ skipping 490 matching lines @@
   // "matches" from say "blessed_extension" then they can use complex features.
   if ((context == WEB_PAGE_CONTEXT || context == WEBUI_CONTEXT) &&
       !matches_.MatchesURL(url)) {
     return CreateAvailability(INVALID_URL, url);
   }
 
   return CreateAvailability(IS_AVAILABLE);
 }
 
 }  // namespace extensions