Reland deprecation of HAllocateObject in favor of HAllocate.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 0b2fe16481fb610cae86a51f733f4cd63c188139..c4cc40ca260aa7f65353cb06a16ccbde55c8bf13 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -4449,10 +4449,7 @@ MaybeObject* Heap::AllocateJSObjectFromMap(Map* map, PretenureFlag pretenure) {
   ASSERT(map->instance_type() != JS_BUILTINS_OBJECT_TYPE);
 
   // Allocate the backing storage for the properties.
-  int prop_size =
-      map->pre_allocated_property_fields() +
-      map->unused_property_fields() -
-      map->inobject_properties();
+  int prop_size = map->InitialPropertiesLength();
   ASSERT(prop_size >= 0);
   Object* properties;
   { MaybeObject* maybe_properties = AllocateFixedArray(prop_size, pretenure);
@@ -4489,10 +4486,7 @@ MaybeObject* Heap::AllocateJSObjectFromMapWithAllocationSite(Map* map,
   ASSERT(map->instance_type() != JS_BUILTINS_OBJECT_TYPE);
 
   // Allocate the backing storage for the properties.
-  int prop_size =
-      map->pre_allocated_property_fields() +
-      map->unused_property_fields() -
-      map->inobject_properties();
+  int prop_size = map->InitialPropertiesLength();
   ASSERT(prop_size >= 0);
   Object* properties;
   { MaybeObject* maybe_properties = AllocateFixedArray(prop_size);