Decouple root visitors from object visitors.

src/snapshot/code-serializer.cc

 // Copyright 2016 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/code-serializer.h"
 
 #include <memory>
 
 #include "src/code-stubs.h"
 #include "src/counters.h"
 #include "src/log.h"
 #include "src/macro-assembler.h"
 #include "src/objects-inl.h"
 #include "src/snapshot/deserializer.h"
 #include "src/snapshot/snapshot.h"
 #include "src/version.h"
+#include "src/visitors.h"
 #include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-objects.h"
 
 namespace v8 {
 namespace internal {
 
 ScriptData* CodeSerializer::Serialize(Isolate* isolate,
                                       Handle<SharedFunctionInfo> info,
                                       Handle<String> source) {
   base::ElapsedTimer timer;
@@ skipping 16 matching lines @@
     int length = ret->length();
     PrintF("[Serializing to %d bytes took %0.3f ms]\n", length, ms);
   }
 
   return ret;
 }
 
 ScriptData* CodeSerializer::Serialize(Handle<HeapObject> obj) {
   DisallowHeapAllocation no_gc;
 
-  VisitPointer(Handle<Object>::cast(obj).location());
+  VisitRootPointer(Root::kHandleScope, Handle<Object>::cast(obj).location());
   SerializeDeferredObjects();
   Pad();
 
   SerializedCodeData data(sink()->data(), this);
 
   return data.GetScriptData();
 }
 
 void CodeSerializer::SerializeObject(HeapObject* obj, HowToCode how_to_code,
                                      WhereToPoint where_to_point, int skip) {
@@ skipping 429 matching lines @@
   *rejection_result = scd.SanityCheck(isolate, expected_source_hash);
   if (*rejection_result != CHECK_SUCCESS) {
     cached_data->Reject();
     return SerializedCodeData(nullptr, 0);
   }
   return scd;
 }
 
 }  // namespace internal
 }  // namespace v8