Add experimental versions of the malware interstitial

chrome/browser/resources/safe_browsing/safe_browsing_v3.js

 // Copyright 2014 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.
 
 // Must match the commands handled by SafeBrowsingBlockingPage::CommandReceived.
 var SB_CMD_DO_REPORT = 'doReport';
 var SB_CMD_DONT_REPORT = 'dontReport';
 var SB_CMD_EXPANDED_SEE_MORE = 'expandedSeeMore';
 var SB_CMD_LEARN_MORE_2 = 'learnMore2';
 var SB_CMD_PROCEED = 'proceed';
@@ skipping 15 matching lines @@
 
   $('opt-in-label').innerHTML = loadTimeData.getString('optInLink');
   $('opt-in-checkbox').checked = loadTimeData.getBoolean(SB_BOX_CHECKED);
   $('malware-opt-in').classList.remove('hidden');
 
   $('opt-in-checkbox').addEventListener('click', function() {
     sendCommand(
         $('opt-in-checkbox').checked ? SB_CMD_DO_REPORT : SB_CMD_DONT_REPORT);
   });
 }
+
+function setupMalwareFinchExperiment() {
+  if (loadTimeData.getString('trialCondition') != 'V3Advice')
+    return;
+  // Add all this dynamically instead of into the HTML because it's just a
+  // short-lived experiment.
+  var heading = document.createElement('h2');
+  heading.innerText = loadTimeData.getString('adviceHeading');
+  $('details').insertBefore(heading, $('details').firstChild);
+}