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

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 51ff64babb8406d4b0a4b7c1ad3bb961d82b8909..37c1cec6f7df4fc1e5a0772fad1c4966d3a89963 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -2408,11 +2408,11 @@ 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());
-  Mov(x4, Operand(debug_step_action));
+  ExternalReference step_in_enabled =
+      ExternalReference::debug_step_in_enabled_address(isolate());
+  Mov(x4, Operand(step_in_enabled));
   ldrb(x4, MemOperand(x4));
-  CompareAndBranch(x4, Operand(StepIn), ne, &skip_flooding);
+  CompareAndBranch(x4, Operand(0), eq, &skip_flooding);
   {
     FrameScope frame(this,
                      has_frame() ? StackFrame::NONE : StackFrame::INTERNAL);