Debugger: ensure that functions with debug info have code with break slots.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index b21724583d879df280080fd49a5e50655d24ce9a..c5f7a2c5d9e705cdd83454a0e65455c2b3a79100 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5565,29 +5565,22 @@ void SharedFunctionInfo::TryReenableOptimization() {
 }
 
 
-bool JSFunction::IsBuiltin() {
-  return context()->global_object()->IsJSBuiltinsObject();
+bool SharedFunctionInfo::IsSubjectToDebugging() {
+  Object* script_obj = script();
+  if (script_obj->IsUndefined()) return false;
+  Script* script = Script::cast(script_obj);
+  Script::Type type = static_cast<Script::Type>(script->type()->value());
+  return type == Script::TYPE_NORMAL;
 }
 
 
-bool JSFunction::IsFromNativeScript() {
-  Object* script = shared()->script();
-  bool native = script->IsScript() &&
-                Script::cast(script)->type()->value() == Script::TYPE_NATIVE;
-  DCHECK(!IsBuiltin() || native);  // All builtins are also native.
-  return native;
-}
-
-
-bool JSFunction::IsFromExtensionScript() {
-  Object* script = shared()->script();
-  return script->IsScript() &&
-         Script::cast(script)->type()->value() == Script::TYPE_EXTENSION;
+bool JSFunction::IsBuiltin() {
+  return context()->global_object()->IsJSBuiltinsObject();
 }
 
 
 bool JSFunction::IsSubjectToDebugging() {
-  return !IsFromNativeScript() && !IsFromExtensionScript();
+  return shared()->IsSubjectToDebugging();
 }