Win64 - Allow returning two values from a runtime function.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index f10ec16aa274f0d6dfd8a7d5b3a83e939f6fc089..4ebf4b6c7857dfb3efda8d8a401b8d2428821970 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -275,7 +275,9 @@ class MacroAssembler: public Assembler {
   // Tail call of a runtime routine (jump).
   // Like JumpToBuiltin, but also takes care of passing the number
   // of arguments.
-  void TailCallRuntime(const ExternalReference& ext, int num_arguments);
+  void TailCallRuntime(const ExternalReference& ext,
+                       int num_arguments,
+                       int result_size);
 
   // Jump to the builtin routine.
   void JumpToBuiltin(const ExternalReference& ext);