Adapt use-site to new BoilerplateDescription.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 8f7eea5e0d587ac873715fc21af1c9fcfb6cbc4f..fed965e68a47f3cc6460eed1a32c5bc7d7d73ee0 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -5473,7 +5473,7 @@ void HOptimizedGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
     site_context.ExitScope(site, boilerplate);
   } else {
     NoObservableSideEffectsScope no_effects(this);
-    Handle<FixedArray> constant_properties =
+    Handle<BoilerplateDescription> constant_properties =
         expr->GetOrBuildConstantProperties(isolate());
     int literal_index = expr->literal_index();
     int flags = expr->ComputeFlags(true);