Revert "Use JS backend in serialization_analysis_test"

pkg/compiler/lib/src/enqueue.dart

Index: pkg/compiler/lib/src/enqueue.dart
diff --git a/pkg/compiler/lib/src/enqueue.dart b/pkg/compiler/lib/src/enqueue.dart
index cff7dba2e5c547df4267afb9ff0a4cd910df86ac..2c7403fec3c6e07ad35a98cdacc217928be81a8e 100644
--- a/pkg/compiler/lib/src/enqueue.dart
+++ b/pkg/compiler/lib/src/enqueue.dart
@@ -803,8 +803,14 @@ class ResolutionEnqueuer extends Enqueuer {
 
     compiler.world.registerUsedElement(element);
 
-    ResolutionWorkItem workItem = compiler.resolution.createWorkItem(
-        element, itemCompilationContextCreator());
+    ResolutionWorkItem workItem;
+    if (compiler.serialization.isDeserialized(element)) {
+      workItem = compiler.serialization.createResolutionWorkItem(
+          element, itemCompilationContextCreator());
+    } else {
+      workItem = new ResolutionWorkItem(
+          element, itemCompilationContextCreator());
+    }
     queue.add(workItem);
 
     // Enable isolate support if we start using something from the isolate