[heap] Avoid overzealous inclusion of heap internal headers.

src/heap/objects-visiting.cc

 // Copyright 2011 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/v8.h"
 
+#include "src/heap/mark-compact-inl.h"
 #include "src/heap/objects-visiting.h"
 
 namespace v8 {
 namespace internal {
 
 
 StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId(
     int instance_type, int instance_size, bool has_unboxed_fields) {
   if (instance_type < FIRST_NONSTRING_TYPE) {
     switch (instance_type & kStringRepresentationMask) {
@@ skipping 339 matching lines @@
 };
 
 
 template Object* VisitWeakList<Context>(Heap* heap, Object* list,
                                         WeakObjectRetainer* retainer);
 
 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list,
                                                WeakObjectRetainer* retainer);
 }  // namespace internal
 }  // namespace v8