Introduce one way dependencies into object grouping.

src/api.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4108 matching lines @@
   if (IsDeadCheck("v8::V8::SetFailedAccessCheckCallbackFunction()")) return;
   i::Top::SetFailedAccessCheckCallback(callback);
 }
 
 
 void V8::AddObjectGroup(Persistent<Value>* objects,
                         size_t length,
                         RetainedObjectInfo* info) {
   if (IsDeadCheck("v8::V8::AddObjectGroup()")) return;
   STATIC_ASSERT(sizeof(Persistent<Value>) == sizeof(i::Object**));
-  i::GlobalHandles::AddGroup(
+  i::GlobalHandles::AddObjectGroup(
       reinterpret_cast<i::Object***>(objects), length, info);
 }
 
 
+void V8::AddImplicitRefGroup(Persistent<Object> parent,
+                             Persistent<Value>* children,
+                             size_t length) {
+  if (IsDeadCheck("v8::V8::AddImplicitRefGroup()")) return;
+  STATIC_ASSERT(sizeof(Persistent<Value>) == sizeof(i::Object**));
+  i::GlobalHandles::AddImplicitRefGroup(
+      *Utils::OpenHandle(*parent),
+      reinterpret_cast<i::Object***>(children), length);
+}
+
+
 int V8::AdjustAmountOfExternalAllocatedMemory(int change_in_bytes) {
   if (IsDeadCheck("v8::V8::AdjustAmountOfExternalAllocatedMemory()")) return 0;
   return i::Heap::AdjustAmountOfExternalAllocatedMemory(change_in_bytes);
 }
 
 
 void V8::SetGlobalGCPrologueCallback(GCCallback callback) {
   if (IsDeadCheck("v8::V8::SetGlobalGCPrologueCallback()")) return;
   i::Heap::SetGlobalGCPrologueCallback(callback);
 }
@@ skipping 1080 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* thread_local =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   thread_local->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal