Experiment with a compact mode for simple preloaded entries.

net/http/transport_security_state_static_unittest3.json

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is a HSTS preloaded list used by the unittests. For more information
 // on the content and format see the comments in
 // transport_security_state_static.json.
 
 {
   "pinsets": [
@@ skipping 40 matching lines @@
       "name": "mix.badssl.com",
       "mode": "force-https",
       "include_subdomains": false,
       "pins": "test2",
       "include_subdomains_for_pinning": true,
       "expect_ct": true,
       "expect_ct_report_uri": "https://report.example.com/ct-upload",
       "expect_staple": true,
       "include_subdomains_for_expect_staple": true,
       "expect_staple_report_uri": "https://report.badssl.com/staple-upload"
+    }, {
+      // Keep this a simple entry in the context of TrieWriter::IsSimpleEntry().
+      "name": "simple-entry.example.com",
+      "mode": "force-https",
+      "include_subdomains": true
     }
   ]
 }