[turbofan] Some more cleanup on the intrinsics.

src/compiler/access-builder.h

Index: src/compiler/access-builder.h
diff --git a/src/compiler/access-builder.h b/src/compiler/access-builder.h
index c4b734d2d26c221344f16befcdd240b514b9ad41..01fddc6ec4c70128df9d9eb36b8720107539a873 100644
--- a/src/compiler/access-builder.h
+++ b/src/compiler/access-builder.h
@@ -55,6 +55,12 @@ class AccessBuilder final : public AllStatic {
   // Provides access to JSDate fields.
   static FieldAccess ForJSDateField(JSDate::FieldIndex index);
 
+  // Provides access to JSRegExp::flags() field.
+  static FieldAccess ForJSRegExpFlags();
+
+  // Provides access to JSRegExp::source() field.
+  static FieldAccess ForJSRegExpSource();
+
   // Provides access to FixedArray::length() field.
   static FieldAccess ForFixedArrayLength();