Swapped transition array and descriptor array.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 8e64f9e39cc5d02ee46e4b4ed77423c360594754..698192389a7ec5284d2a3c88a596dfe79f012329 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -3711,8 +3711,7 @@ MaybeObject* Heap::AllocateFunctionPrototype(JSFunction* function) {
   // constructors.
   Map* new_map;
   ASSERT(object_function->has_initial_map());
-  MaybeObject* maybe_map =
-      object_function->initial_map()->Copy(DescriptorArray::MAY_BE_SHARED);
+  MaybeObject* maybe_map = object_function->initial_map()->Copy();
   if (!maybe_map->To(&new_map)) return maybe_map;
 
   Object* prototype;
@@ -3856,8 +3855,7 @@ MaybeObject* Heap::AllocateInitialMap(JSFunction* fun) {
       fun->shared()->ForbidInlineConstructor();
     } else {
       DescriptorArray* descriptors;
-      MaybeObject* maybe_descriptors =
-          DescriptorArray::Allocate(count, DescriptorArray::MAY_BE_SHARED);
+      MaybeObject* maybe_descriptors = DescriptorArray::Allocate(count);
       if (!maybe_descriptors->To(&descriptors)) return maybe_descriptors;
 
       DescriptorArray::WhitenessWitness witness(descriptors);
@@ -3876,7 +3874,8 @@ MaybeObject* Heap::AllocateInitialMap(JSFunction* fun) {
       if (HasDuplicates(descriptors)) {
         fun->shared()->ForbidInlineConstructor();
       } else {
-        map->InitializeDescriptors(descriptors);
+        MaybeObject* maybe_failure = map->InitializeDescriptors(descriptors);
+        if (maybe_failure->IsFailure()) return maybe_failure;
         map->set_pre_allocated_property_fields(count);
         map->set_unused_property_fields(in_object_properties - count);
       }