PPC: [debugger] Remove code to predict step-in target.

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index 478f2f42c9e9432ba04b17f21d2012663dbc1786..34a37241fd4aba54d8d772835db79872d04edc49 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -1089,12 +1089,12 @@ void MacroAssembler::FloodFunctionIfStepping(Register fun, Register new_target,
                                              const ParameterCount& expected,
                                              const ParameterCount& actual) {
   Label skip_flooding;
-  ExternalReference debug_step_action =
-      ExternalReference::debug_last_step_action_address(isolate());
-  mov(r7, Operand(debug_step_action));
+  ExternalReference step_in_enabled =
+      ExternalReference::debug_step_in_enabled_address(isolate());
+  mov(r7, Operand(step_in_enabled));
   lbz(r7, MemOperand(r7));
-  cmpi(r7, Operand(StepIn));
-  bne(&skip_flooding);
+  cmpi(r7, Operand::Zero());
+  beq(&skip_flooding);
   {
     FrameScope frame(this,
                      has_frame() ? StackFrame::NONE : StackFrame::INTERNAL);