[turbofan] Switch JSForInPrepare to %ForInPrepare style.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 82d44865a05f39cdafc2f37642681e1cdea6a912..82304538d4dc0ef8deacac81eb1dfd33e043cbd2 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -1084,8 +1084,10 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ LoadSmiLiteral(r4, Smi::FromInt(1));  // Smi(1) indicates slow check
   __ Push(r4, r3);  // Smi and array
   __ LoadP(r4, FieldMemOperand(r3, FixedArray::kLengthOffset));
+  __ Push(r4);  // Fixed array length (as smi).
+  PrepareForBailoutForId(stmt->PrepareId(), NO_REGISTERS);
   __ LoadSmiLiteral(r3, Smi::FromInt(0));
-  __ Push(r4, r3);  // Fixed array length (as smi) and initial index.
+  __ Push(r3);  // Initial index.
 
   // Generate code for doing the condition check.
   __ bind(&loop);