Make PEM debugging section fixed width in the SSL interstitial

components/security_interstitials/core/browser/resources/ssl.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.
 
 function setupSSLDebuggingInfo() {
   if (loadTimeData.getString('type') != 'SSL')
     return;
 
   // The titles are not internationalized because this is debugging information
   // for bug reports, help center posts, etc.
   appendDebuggingField('Subject', loadTimeData.getString('subject'));
   appendDebuggingField('Issuer', loadTimeData.getString('issuer'));
   appendDebuggingField('Expires on', loadTimeData.getString('expirationDate'));
   appendDebuggingField('Current date', loadTimeData.getString('currentDate'));
-  appendDebuggingField('PEM encoded chain', loadTimeData.getString('pem'));
+  appendDebuggingField('PEM encoded chain', loadTimeData.getString('pem'),
+                       true);
 
   $('error-code').addEventListener('click', toggleDebuggingInfo);
 }