[ic] Cache weak cells containing prototypes in respective PrototypeInfo objects.

src/ic/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ic/ic.h"
 
 #include "src/accessors.h"
 #include "src/api-arguments-inl.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 875 matching lines @@
 
 Handle<Object> LoadIC::SimpleLoadFromPrototype(Handle<Map> receiver_map,
                                                Handle<JSObject> holder,
                                                Handle<Object> smi_handler) {
   DCHECK(IsPrototypeValidityCellCheckEnough(receiver_map, holder));
 
   Handle<Cell> validity_cell =
       Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());
   DCHECK(!validity_cell.is_null());
 
-  Factory* factory = isolate()->factory();
-
-  Handle<WeakCell> holder_cell = factory->NewWeakCell(holder);
-  return factory->NewTuple3(validity_cell, holder_cell, smi_handler);
+  Handle<WeakCell> holder_cell =
+      Map::GetOrCreatePrototypeWeakCell(holder, isolate());
+  return isolate()->factory()->NewTuple3(validity_cell, holder_cell,
+                                         smi_handler);
 }
 
 bool IsCompatibleReceiver(LookupIterator* lookup, Handle<Map> receiver_map) {
   DCHECK(lookup->state() == LookupIterator::ACCESSOR);
   Isolate* isolate = lookup->isolate();
   Handle<Object> accessors = lookup->GetAccessors();
   if (accessors->IsAccessorInfo()) {
     Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors);
     if (info->getter() != NULL &&
         !AccessorInfo::IsCompatibleReceiverMap(isolate, info, receiver_map)) {
@@ skipping 2068 matching lines @@
     DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state());
     it.Next();
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
                                        Object::GetProperty(&it));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8