Serialize WarnOnUseElement

pkg/compiler/lib/src/serialization/keys.dart

Index: pkg/compiler/lib/src/serialization/keys.dart
diff --git a/pkg/compiler/lib/src/serialization/keys.dart b/pkg/compiler/lib/src/serialization/keys.dart
index a7d7d2b0bd7654b8621d038284a83818f655a2a9..b73937dfa1f2bd32aebdcd87c6532389ed8c1bed 100644
--- a/pkg/compiler/lib/src/serialization/keys.dart
+++ b/pkg/compiler/lib/src/serialization/keys.dart
@@ -52,8 +52,9 @@ class Key {
   static const Key IMPORT = const Key('import');
   static const Key IMPORTS = const Key('imports');
   static const Key IMPORT_SCOPE = const Key('import-scope');
-  static const Key INTERFACES = const Key('interfaces');
   static const Key INDEX = const Key('index');
+  static const Key INFO = const Key('info');
+  static const Key INTERFACES = const Key('interfaces');
   static const Key IS_ABSTRACT = const Key('isAbstract');
   static const Key IS_BREAK_TARGET = const Key('isBreakTarget');
   static const Key IS_CONST = const Key('isConst');
@@ -115,6 +116,7 @@ class Key {
   static const Key SEMANTICS = const Key('semantics');
   static const Key SEND_STRUCTURE = const Key('sendStructure');
   static const Key SETTER = const Key('setter');
+  static const Key SOURCE_SPAN = const Key('sourceSpan');
   static const Key STATIC_USES = const Key('static-uses');
   static const Key SUB_KIND = const Key('subKind');
   static const Key SUPERTYPE = const Key('supertype');
@@ -132,6 +134,7 @@ class Key {
   static const Key URI = const Key('uri');
   static const Key VALUE = const Key('value');
   static const Key VALUES = const Key('values');
+  static const Key WARNING = const Key('warning');
 
   final String name;