[debugger,interpreter] precisely determine execution tier.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 12dd06e6ef1998bdcc7fe24667cd20439a6b1fe8..c692671354a0763e82e5133a80649050e5c2fbc8 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6758,6 +6758,7 @@ class SharedFunctionInfo: public HeapObject {
   inline FunctionTemplateInfo* get_api_func_data();
   inline void set_api_func_data(FunctionTemplateInfo* data);
   inline bool HasBytecodeArray();
+  inline bool IsInterpreted();
   inline BytecodeArray* bytecode_array();
   inline void set_bytecode_array(BytecodeArray* bytecode);
   inline void ClearBytecodeArray();