Introduce lock screen app context to extension features

tools/json_schema_compiler/test/features_generation_unittest.cc

Index: tools/json_schema_compiler/test/features_generation_unittest.cc
diff --git a/tools/json_schema_compiler/test/features_generation_unittest.cc b/tools/json_schema_compiler/test/features_generation_unittest.cc
index 18f2f149fd1c11256d139c7bfc9142eb72211111..28a90eddd87f149787cc42644ba4c087377a4bbe 100644
--- a/tools/json_schema_compiler/test/features_generation_unittest.cc
+++ b/tools/json_schema_compiler/test/features_generation_unittest.cc
@@ -192,11 +192,14 @@ TEST(FeaturesGenerationTest, FeaturesTest) {
   {
     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,