Revert of [regexp] Remove remainder of native RegExpExecStub

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 3db92f1d4373c3a7eef28fd4cc737a3a5133103b..0f66ebff219509de854839b2d96fd09c180074ad 100644
--- a/src/builtins/builtins-regexp-gen.h
+++ b/src/builtins/builtins-regexp-gen.h
@@ -36,10 +36,10 @@
                          String::Encoding encoding, Variable* var_string_start,
                          Variable* var_string_end);
 
-  // Low level logic around the actual call into pattern matching code.
-  Node* RegExpExecInternal(Node* const context, Node* const regexp,
-                           Node* const string, Node* const last_index,
-                           Node* const match_info);
+  // Low level logic around the actual call into generated Irregexp code.
+  Node* IrregexpExec(Node* const context, Node* const regexp,
+                     Node* const string, Node* const last_index,
+                     Node* const match_info);
 
   Node* ConstructNewResultFromMatchInfo(Node* const context, Node* const regexp,
                                         Node* const match_info,