Support old and new weak handle API

src/global-handles.cc

 // Copyright 2009 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/api.h"
 #include "src/global-handles.h"
 
 #include "src/vm-state-inl.h"
@@ skipping 267 matching lines @@
         DCHECK(jsobject->GetInternalFieldCount() >= 1);
         internal_field0 = jsobject->GetInternalField(0);
         if (weakness_type() == PHANTOM_WEAK_2_INTERNAL_FIELDS) {
           DCHECK(jsobject->GetInternalFieldCount() >= 2);
           internal_field1 = jsobject->GetInternalField(1);
         }
       }
 
       // Zap with harmless value.
       *location() = Smi::FromInt(0);
-      typedef PhantomCallbackData<void, void, void> Data;
+      typedef PhantomCallbackData<void> Data;
 
       if (!internal_field0->IsSmi()) internal_field0 = nullptr;
       if (!internal_field1->IsSmi()) internal_field1 = nullptr;
 
       Data data(api_isolate, parameter(), internal_field0, internal_field1);
       Data::Callback callback =
           reinterpret_cast<Data::Callback>(weak_callback_);
 
       pending_phantom_callbacks->Add(
           PendingPhantomCallback(this, data, callback));
@@ skipping 256 matching lines @@
   if (location != NULL) Node::FromLocation(location)->Release();
 }
 
 
 void GlobalHandles::MakeWeak(Object** location, void* parameter,
                              WeakCallback weak_callback) {
   Node::FromLocation(location)->MakeWeak(parameter, weak_callback);
 }
 
 
-typedef PhantomCallbackData<void, void, void>::Callback GenericCallback;
+typedef PhantomCallbackData<void>::Callback GenericCallback;
 
 
 void GlobalHandles::MakePhantom(Object** location, void* parameter,
                                 int number_of_internal_fields,
                                 GenericCallback phantom_callback) {
   Node::FromLocation(location)
       ->MakePhantom(parameter, number_of_internal_fields, phantom_callback);
 }
 
 
@@ skipping 657 matching lines @@
   DCHECK_EQ(isolate->heap()->the_hole_value(), blocks_[block][offset]);
   blocks_[block][offset] = object;
   if (isolate->heap()->InNewSpace(object)) {
     new_space_indices_.Add(size_);
   }
   *index = size_++;
 }
 
 
 } }  // namespace v8::internal