[heap] Limit friendship of the Heap class to essentials.

src/snapshot/serialize.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/snapshot/serialize.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 758 matching lines @@
     DCHECK_NULL(StringTable::LookupKeyIfExists(isolate, &key));
     StringTable::LookupKey(isolate, &key);
   }
 
   Heap* heap = isolate->heap();
   Factory* factory = isolate->factory();
   for (Handle<Script> script : new_scripts_) {
     // Assign a new script id to avoid collision.
     script->set_id(isolate_->heap()->NextScriptId());
     // Add script to list.
-    heap->set_script_list(*WeakFixedArray::Add(factory->script_list(), script));
+    Handle<Object> list = WeakFixedArray::Add(factory->script_list(), script);
+    heap->SetRootScriptList(*list);
   }
 }
 
 
 HeapObject* Deserializer::GetBackReferencedObject(int space) {
   HeapObject* obj;
   BackReference back_reference(source_.GetInt());
   if (space == LO_SPACE) {
     CHECK(back_reference.chunk_index() == 0);
     uint32_t index = back_reference.large_object_index();
@@ skipping 2089 matching lines @@
   SerializedCodeData* scd = new SerializedCodeData(cached_data);
   SanityCheckResult r = scd->SanityCheck(isolate, source);
   if (r == CHECK_SUCCESS) return scd;
   cached_data->Reject();
   source->GetIsolate()->counters()->code_cache_reject_reason()->AddSample(r);
   delete scd;
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8