Debugger: ensure that break points are set in code that contain debug break slots.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 70e219390964376ad583cc952b9d61d87fe6a58b..7f42ce6f601353c1a28bdf8976995cab8c459776 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7284,6 +7284,9 @@ class JSFunction: public JSObject {
   // Tells whether this function is defined in an extension script.
   inline bool IsFromExtensionScript();
 
+  // Tells whether this function should be subject to debugging.
+  inline bool IsSubjectToDebugging();
+
   // Tells whether or not the function needs arguments adaption.
   inline bool NeedsArgumentsAdaption();