In cases of SSL error page due to HSTS, explain why the user cannot proceed.

chrome/browser/ssl/ssl_blocking_page.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/ssl/ssl_blocking_page.h"
 
 #include "base/i18n/rtl.h"
 #include "base/metrics/histogram.h"
 #include "base/string_piece.h"
 #include "base/utf_string_conversions.h"
@@ skipping 85 matching lines @@
                       l10n_util::GetStringUTF16(IDS_SSL_BLOCKING_PAGE_EXIT));
     strings.SetString("shouldNotProceed",
                       l10n_util::GetStringUTF16(
                           IDS_SSL_BLOCKING_PAGE_SHOULD_NOT_PROCEED));
   } else {
     resource_id = IDR_SSL_ERROR_HTML;
     strings.SetString("title",
                       l10n_util::GetStringUTF16(IDS_SSL_ERROR_PAGE_TITLE));
     strings.SetString("back",
                       l10n_util::GetStringUTF16(IDS_SSL_ERROR_PAGE_BACK));
+    strings.SetString("cannotProceed",
+                      l10n_util::GetStringUTF16(
+                          IDS_SSL_ERROR_PAGE_CANNOT_PROCEED));
   }
 
   strings.SetString("textdirection", base::i18n::IsRTL() ? "rtl" : "ltr");
 
   base::StringPiece html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id));
 
   return jstemplate_builder::GetI18nTemplateHtml(html, &strings);
 }
 
@@ skipping 65 matching lines @@
       "moreInfo1", "moreInfo2", "moreInfo3", "moreInfo4", "moreInfo5"
   };
   int i;
   for (i = 0; i < static_cast<int>(extra_info.size()); i++) {
     strings->SetString(keys[i], extra_info[i]);
   }
   for (; i < 5; i++) {
     strings->SetString(keys[i], "");
   }
 }