[regexp] Add additional asserts to RegExp builtins

src/builtins/builtins-regexp-gen.h

Index: src/builtins/builtins-regexp-gen.h
diff --git a/src/builtins/builtins-regexp-gen.h b/src/builtins/builtins-regexp-gen.h
index 7c818e750a25dc3422017b6b17b278a5ba1d6e09..7d6315d68f3ebddc22d30b145e2664fa05df6577 100644
--- a/src/builtins/builtins-regexp-gen.h
+++ b/src/builtins/builtins-regexp-gen.h
@@ -58,6 +58,7 @@ class RegExpBuiltinsAssembler : public CodeStubAssembler {
                              char const* method_name);
 
   // Analogous to BranchIfFastRegExp, for use in asserts.
+  Node* IsFastRegExp(Node* const context, Node* const object);
   Node* IsFastRegExp(Node* const context, Node* const object, Node* const map);
 
   // Performs fast path checks on the given object itself, but omits prototype