PPC: [for-in] Sanitize for-in optimizations and fix bailout points.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 7ebc2f90e50cb75f5b4dbb84b8d459773a3834ef..c96abb362b65dd0d35652ab421b2502b8cbc45c5 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -1443,9 +1443,9 @@ class MacroAssembler : public Assembler {
   // Returns the pc offset at which the frame ends.
   int LeaveFrame(StackFrame::Type type, int stack_adjustment = 0);
 
-  // Expects object in r0 and returns map with validated enum cache
-  // in r0.  Assumes that any other register can be used as a scratch.
-  void CheckEnumCache(Register null_value, Label* call_runtime);
+  // Expects object in r3 and returns map with validated enum cache
+  // in r3.  Assumes that any other register can be used as a scratch.
+  void CheckEnumCache(Label* call_runtime);
 
   // AllocationMemento support. Arrays may have an associated
   // AllocationMemento object that can be checked for in order to pretransition