Use a dictionary-mode code cache on the map rather than a dual system.

src/factory.cc

 // Copyright 2014 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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 835 matching lines @@
 
 
 Handle<Struct> Factory::NewStruct(InstanceType type) {
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateStruct(type),
       Struct);
 }
 
 
-Handle<CodeCache> Factory::NewCodeCache() {
-  Handle<CodeCache> code_cache =
-      Handle<CodeCache>::cast(NewStruct(CODE_CACHE_TYPE));
-  code_cache->set_default_cache(*empty_fixed_array(), SKIP_WRITE_BARRIER);
-  code_cache->set_normal_type_cache(*undefined_value(), SKIP_WRITE_BARRIER);
-  return code_cache;
-}
-
-
 Handle<AliasedArgumentsEntry> Factory::NewAliasedArgumentsEntry(
     int aliased_context_slot) {
   Handle<AliasedArgumentsEntry> entry = Handle<AliasedArgumentsEntry>::cast(
       NewStruct(ALIASED_ARGUMENTS_ENTRY_TYPE));
   entry->set_aliased_context_slot(aliased_context_slot);
   return entry;
 }
 
 
 Handle<AccessorInfo> Factory::NewAccessorInfo() {
@@ skipping 1504 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8