Never clear debug-stub call ICs. Make a clear distinction between is_debug_stub

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 96b4011664bef5255601b653a0a664e1a7367551..ffd8584d56ab8336b48313dc5714945914d9a3de 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4911,7 +4911,7 @@ class Code: public HeapObject {
 
   // Testers for IC stub kinds.
   inline bool is_inline_cache_stub();
-  inline bool is_debug_break();
+  inline bool is_debug_stub();
   inline bool is_load_stub() { return kind() == LOAD_IC; }
   inline bool is_keyed_load_stub() { return kind() == KEYED_LOAD_IC; }
   inline bool is_store_stub() { return kind() == STORE_IC; }