Add experimental, non-snapshotted V8 extras

src/heap/heap.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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 3289 matching lines @@
   // Allocate cache for external strings pointing to native source code.
   set_natives_source_cache(
       *factory->NewFixedArray(Natives::GetBuiltinsCount()));
 
   set_experimental_natives_source_cache(
       *factory->NewFixedArray(ExperimentalNatives::GetBuiltinsCount()));
 
   set_extra_natives_source_cache(
       *factory->NewFixedArray(ExtraNatives::GetBuiltinsCount()));
 
+  set_experimental_extra_natives_source_cache(
+      *factory->NewFixedArray(ExperimentalExtraNatives::GetBuiltinsCount()));
+
   set_code_stub_natives_source_cache(
       *factory->NewFixedArray(CodeStubNatives::GetBuiltinsCount()));
 
   set_undefined_cell(*factory->NewCell(factory->undefined_value()));
 
   // The symbol registry is initialized lazily.
   set_symbol_registry(Smi::FromInt(0));
 
   // Allocate object to hold object observation state.
   set_observation_state(*factory->NewJSObjectFromMap(
@@ skipping 3581 matching lines @@
     *object_type = "CODE_TYPE";                                                \
     *object_sub_type = "CODE_AGE/" #name;                                      \
     return true;
     CODE_AGE_LIST_COMPLETE(COMPARE_AND_RETURN_NAME)
 #undef COMPARE_AND_RETURN_NAME
   }
   return false;
 }
 }  // namespace internal
 }  // namespace v8