[V8] Unify get function name for debugging purpose

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 457affec184e22bf1d7f385ca8d4a41a8d0e66d8..7e7fd125a2f36673e372b314c3f46a6024c93f42 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7396,6 +7396,11 @@ class JSFunction: public JSObject {
 
   // The function's name if it is configured, otherwise shared function info
   // debug name.
+  static Handle<String> GetName(Handle<JSFunction> function);
+
+  // The function's displayName if it is set, otherwise name if it is
+  // configured, otherwise shared function info
+  // debug name.
   static Handle<String> GetDebugName(Handle<JSFunction> function);
 
   // Layout descriptors. The last property (from kNonWeakFieldsEndOffset to