[debugger] flood function for stepping before calling it.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 45db5bc4fe76ba3e5ca616545fcc33ac0eea5217..5d55fb5f4cde204f90869e86247d16d7fa2a8333 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1580,9 +1580,9 @@ ExternalReference ExternalReference::mod_two_doubles_operation(
 }
 
 
-ExternalReference ExternalReference::debug_step_in_fp_address(
+ExternalReference ExternalReference::debug_last_step_action_address(
     Isolate* isolate) {
-  return ExternalReference(isolate->debug()->step_in_fp_addr());
+  return ExternalReference(isolate->debug()->last_step_action_addr());
 }