Introduce lock screen app context to extension features

tools/json_schema_compiler/test/features_generation_unittest.cc

 // Copyright 2016 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/complex_feature.h"
 #include "extensions/common/features/feature.h"
 #include "extensions/common/features/simple_feature.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/json_schema_compiler/test/features_compiler_test.h"
 
@@ skipping 174 matching lines @@
     comparator.channel.reset(
         new version_info::Channel(version_info::Channel::DEV));
     comparator.matches.AddPattern(
         URLPattern(URLPattern::SCHEME_ALL, "*://example.com/*"));
     comparator.min_manifest_version = 2;
     comparator.CompareFeature(feature);
   }
   {
     SimpleFeature* feature = GetAsSimpleFeature("allEnum");
     FeatureComparator comparator("allEnum");
-    comparator.contexts = {
-        Feature::BLESSED_EXTENSION_CONTEXT,  Feature::BLESSED_WEB_PAGE_CONTEXT,
-        Feature::CONTENT_SCRIPT_CONTEXT,     Feature::SERVICE_WORKER_CONTEXT,
-        Feature::WEB_PAGE_CONTEXT,           Feature::WEBUI_CONTEXT,
-        Feature::UNBLESSED_EXTENSION_CONTEXT};
+    comparator.contexts = {Feature::BLESSED_EXTENSION_CONTEXT,
+                           Feature::BLESSED_WEB_PAGE_CONTEXT,
+                           Feature::CONTENT_SCRIPT_CONTEXT,
+                           Feature::LOCK_SCREEN_EXTENSION_CONTEXT,
+                           Feature::SERVICE_WORKER_CONTEXT,
+                           Feature::WEB_PAGE_CONTEXT,
+                           Feature::WEBUI_CONTEXT,
+                           Feature::UNBLESSED_EXTENSION_CONTEXT};
     comparator.extension_types = {
         Manifest::TYPE_EXTENSION,           Manifest::TYPE_HOSTED_APP,
         Manifest::TYPE_LEGACY_PACKAGED_APP, Manifest::TYPE_PLATFORM_APP,
         Manifest::TYPE_SHARED_MODULE,       Manifest::TYPE_THEME};
     comparator.channel.reset(
         new version_info::Channel(version_info::Channel::BETA));
     comparator.CompareFeature(feature);
   }
   {
     // Omega is imported from a second .json file.
@@ skipping 112 matching lines @@
     ASSERT_EQ("", feature->source());
   }
   {
     Feature* feature = provider.GetFeature("alias_parent.child");
     ASSERT_EQ("", feature->alias());
     ASSERT_EQ("child_source", feature->source());
   }
 }
 
 }  // namespace extensions