[regexp] Add support for dotAll flag

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 4cb5a9717f39e70816b35aa7c18d7bb3059e8a60..440cc6b7f5b2779bb763ad79f0b3ec3517e090ae 100644
--- a/src/builtins/builtins-regexp-gen.h
+++ b/src/builtins/builtins-regexp-gen.h
@@ -72,8 +72,10 @@ class RegExpBuiltinsAssembler : public CodeStubAssembler {
   Node* FlagGetter(Node* const context, Node* const regexp, JSRegExp::Flag flag,
                    bool is_fastpath);
   void FlagGetter(Node* context, Node* receiver, JSRegExp::Flag flag,
-                  v8::Isolate::UseCounterFeature counter,
-                  const char* method_name);
+                  int counter, const char* method_name);
+
+  // Utility method, remove once dotall is unstaged.
+  Node* IsDotAllEnabled(Isolate* isolate);
 
   Node* IsRegExp(Node* const context, Node* const maybe_receiver);
   Node* RegExpInitialize(Node* const context, Node* const regexp,