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

src/snapshot/serialize.cc

Index: src/snapshot/serialize.cc
diff --git a/src/snapshot/serialize.cc b/src/snapshot/serialize.cc
index 8da750a22217942410fa596a58d5b796c41e2c5f..8a42645312a1d96c38b0aa3cb55bd737e21ad903 100644
--- a/src/snapshot/serialize.cc
+++ b/src/snapshot/serialize.cc
@@ -60,8 +60,8 @@ ExternalReferenceTable::ExternalReferenceTable(Isolate* isolate) {
       "Heap::NewSpaceAllocationLimitAddress()");
   Add(ExternalReference::new_space_allocation_top_address(isolate).address(),
       "Heap::NewSpaceAllocationTopAddress()");
-  Add(ExternalReference::debug_last_step_action_address(isolate).address(),
-      "Debug::last_step_action_addr()");
+  Add(ExternalReference::debug_step_in_enabled_address(isolate).address(),
+      "Debug::step_in_enabled_address()");
   Add(ExternalReference::mod_two_doubles_operation(isolate).address(),
       "mod_two_doubles");
   // Keyed lookup cache.