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..6c8d5ff730c7d7a1149ee8952e74f7cedce76013 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1224,13 +1224,16 @@ class MacroAssembler: public Assembler {
   // rcx (rcx must be preserverd until CallApiFunctionAndReturn).  Saves
   // context (rsi).  Clobbers rax.  Allocates arg_stack_space * kPointerSize
   // inside the exit frame (not GCed) accessible via StackSpaceOperand.
-  void PrepareCallApiFunction(int arg_stack_space);
+  void PrepareCallApiFunction(int arg_stack_space, bool returns_handle);
 
   // Calls an API function.  Allocates HandleScope, extracts returned value
   // 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,
+                                bool returns_handle,
+                                int return_value_offset_from_rbp);
 
   // 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],