Add a Certificate Viewer link to the Page Info dropdown

components/page_info_strings.grdp

Index: components/page_info_strings.grdp
diff --git a/components/page_info_strings.grdp b/components/page_info_strings.grdp
index f90b393d1c5d3f7d7708a4f02bb8e3fd710e6c24..959ab57f584e5b4387aa273723092c7e2df7cafe 100644
--- a/components/page_info_strings.grdp
+++ b/components/page_info_strings.grdp
@@ -1,5 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
+
+  <!-- Certificate Viewer link -->

[lgarron, 2017/04/28 23:16:43]

Nit: The strings in this file are in the order they appear in the UI. Could you
place this section after "Detail strings"?
(Not perfectly, but I'm working on it:
https://codereview.chromium.org/2849713003)

[elawrence, 2017/04/29 12:38:59]

Done.

+  <message name="IDS_PAGE_INFO_CERTIFICATE" desc="Title of the certificate area in the Page Information Window, shown when a HTTPS site is loaded.">

[lgarron, 2017/04/28 23:16:43]

Nit: Strings descriptions are standardized to "Page Info bubble".

[elawrence, 2017/04/29 12:38:59]

Done.

+    Certificate
+  </message>
+  <message name="IDS_PAGE_INFO_CERTIFICATE_VALID_LINK" desc="Text of the link that launches the Certificate Viewer. This appears in the Page Information Window when a HTTPS site is loaded with a valid certificate.">

[lgarron, 2017/04/28 23:16:43]

Nit: I would reverse the description sentences to emphasize what the string
means, not what the UI uses it for.

[elawrence, 2017/04/29 12:38:59]

Done.

+    Valid
+  </message>
+  <message name="IDS_PAGE_INFO_CERTIFICATE_INVALID_LINK" desc="Text of the link that launches the Certificate Viewer. This appears in the Page Information Window when a HTTPS site is loaded with an invalid certificate, e.g. https://wrong.host.badssl.com/.">

[lgarron, 2017/04/28 23:16:43]

Same.

[elawrence, 2017/04/29 12:38:59]

Done.

+    Invalid
+  </message>
+  <message name="IDS_PAGE_INFO_CERTIFICATE_VALID_LINK_TOOLTIP" desc="The text of the tooltip on IDS_PAGE_INFO_CERTIFICATE_VALID_LINK">
+    Issued by <ph name="ISSUER">$1<ex>Let's Encrypt X3</ex></ph>.

[lgarron, 2017/04/28 23:16:43]

Nit: My instinct is that this string should not have a period at the end. Did UI
weigh in?

[elawrence, 2017/04/29 12:38:59]

Done. Terminal punctuation for Infotips which are full sentences. They declined
using a full sentence, so no terminal punctuation.

+  </message>
+
   <!-- Summary strings -->
   <message name="IDS_PAGEINFO_SECURE_SUMMARY" desc="A short summary phrase at the top of the Page Info bubble (which shows when you click the lock icon) that indicates that the connection to the current website is secure.">
     Secure connection