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

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index f38e1ff514087cad7b65b20ea08fe40acf5383db..dfe272972d9ea3fee9aa54abe69eb38437367704 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -4150,11 +4150,11 @@ 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());
-  Operand debug_step_action_operand = ExternalOperand(debug_step_action);
-  cmpb(debug_step_action_operand, Immediate(StepIn));
-  j(not_equal, &skip_flooding);
+  ExternalReference step_in_enabled =
+      ExternalReference::debug_step_in_enabled_address(isolate());
+  Operand step_in_enabled_operand = ExternalOperand(step_in_enabled);
+  cmpb(step_in_enabled_operand, Immediate(0));
+  j(equal, &skip_flooding);
   {
     FrameScope frame(this,
                      has_frame() ? StackFrame::NONE : StackFrame::INTERNAL);