Revert "Remove Registry from registerMetadataConstant" and "Serialize metadata"

pkg/compiler/lib/src/common/backend_api.dart

Index: pkg/compiler/lib/src/common/backend_api.dart
diff --git a/pkg/compiler/lib/src/common/backend_api.dart b/pkg/compiler/lib/src/common/backend_api.dart
index c4c9020931b664c97d09d99658e28d06800b3508..5bbb2f0655fc8a834b644ec6d30716ef4bed56be 100644
--- a/pkg/compiler/lib/src/common/backend_api.dart
+++ b/pkg/compiler/lib/src/common/backend_api.dart
@@ -131,6 +131,11 @@ abstract class Backend extends Target {
   /// Called during codegen when [constant] has been used.
   void registerCompileTimeConstant(ConstantValue constant, Registry registry) {}
 
+  /// Called during resolution when a constant value for [metadata] on
+  /// [annotatedElement] has been evaluated.
+  void registerMetadataConstant(MetadataAnnotation metadata,
+      Element annotatedElement, Registry registry) {}
+
   /// Called to notify to the backend that a class is being instantiated.
   // TODO(johnniwinther): Remove this. It's only called once for each [cls] and
   // only with [Compiler.globalDependencies] as [registry].
@@ -273,25 +278,23 @@ abstract class Backend extends Target {
   /// been scanned.
   Future onLibraryScanned(LibraryElement library, LibraryLoader loader) {
     // TODO(johnniwinther): Move this to [JavaScriptBackend].
-    if (!compiler.serialization.isDeserialized(library)) {
-      if (canLibraryUseNative(library)) {
-        library.forEachLocalMember((Element element) {
-          if (element.isClass) {
-            checkNativeAnnotation(compiler, element);
-          }
-        });
-      }
-      checkJsInteropAnnotation(compiler, library);
+    if (canLibraryUseNative(library)) {
       library.forEachLocalMember((Element element) {
-        checkJsInteropAnnotation(compiler, element);
-        if (element.isClass && isJsInterop(element)) {
-          ClassElement classElement = element;
-          classElement.forEachMember((_, memberElement) {
-            checkJsInteropAnnotation(compiler, memberElement);
-          });
+        if (element.isClass) {
+          checkNativeAnnotation(compiler, element);
         }
       });
     }
+    checkJsInteropAnnotation(compiler, library);
+    library.forEachLocalMember((Element element) {
+      checkJsInteropAnnotation(compiler, element);
+      if (element.isClass && isJsInterop(element)) {
+        ClassElement classElement = element;
+        classElement.forEachMember((_, memberElement) {
+          checkJsInteropAnnotation(compiler, memberElement);
+        });
+      }
+    });
     return new Future.value();
   }