X87: [debugger] Remove code to predict step-in target.

src/x87/macro-assembler-x87.cc

Index: src/x87/macro-assembler-x87.cc
diff --git a/src/x87/macro-assembler-x87.cc b/src/x87/macro-assembler-x87.cc
index 0aeb3c5ac1eb7561725315c14bacbaa6b454ded0..1cb33438ddf326544ffd82123445b324c9ae8332 100644
--- a/src/x87/macro-assembler-x87.cc
+++ b/src/x87/macro-assembler-x87.cc
@@ -1953,11 +1953,10 @@ 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());
-  cmpb(Operand::StaticVariable(debug_step_action), StepIn);
-  STATIC_ASSERT(StepFrame > StepIn);
-  j(less, &skip_flooding);
+  ExternalReference step_in_enabled =
+      ExternalReference::debug_step_in_enabled_address(isolate());
+  cmpb(Operand::StaticVariable(step_in_enabled), 0);
+  j(equal, &skip_flooding);
   {
     FrameScope frame(this,
                      has_frame() ? StackFrame::NONE : StackFrame::INTERNAL);