new style of property/function callbacks

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 76941ffbaf5383a6c0f09a6d2fa09e4af05d6683..25ff69cb210174620fbc65c5f019ad51454dd4ec 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1230,7 +1230,9 @@ class MacroAssembler: public Assembler {
   // from handle and propagates exceptions.  Clobbers r14, r15, rbx and
   // caller-save registers.  Restores context.  On return removes
   // stack_space * kPointerSize (GCed).
-  void CallApiFunctionAndReturn(Address function_address, int stack_space);
+  void CallApiFunctionAndReturn(Address function_address,
+                                int stack_space,
+                                int return_value_offset);
 
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, arguments must be stored in esp[0], esp[4],