[Interpreter] Add ForInPrepare runtime function which returns a ObjectTriple.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 5f80b4d52f15dde6268c568abace15302ef96e81..40710dc7cb464d44da127a41dde7d3ccc06f62b6 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -967,7 +967,7 @@ void MacroAssembler::EnterExitFrameEpilogue(int argc, bool save_doubles) {
 }
 
 
-void MacroAssembler::EnterExitFrame(bool save_doubles) {
+void MacroAssembler::EnterExitFrame(int argc, bool save_doubles) {
   EnterExitFramePrologue();
 
   // Set up argc and argv in callee-saved registers.
@@ -976,7 +976,7 @@ void MacroAssembler::EnterExitFrame(bool save_doubles) {
   lea(esi, Operand(ebp, eax, times_4, offset));
 
   // Reserve space for argc, argv and isolate.
-  EnterExitFrameEpilogue(3, save_doubles);
+  EnterExitFrameEpilogue(argc, save_doubles);
 }