Change connection info strings (e.g. SHA-1 cert warnings) to be more clear.

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index 1ee0233f28ffa88465fb033deb4a7f622a940e72..fa51b125e99e94ef29ae7680f2b523a3a7e1a079 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -611,7 +611,7 @@ Chromium is unable to recover your settings.
         You are viewing a secure Chromium page.
       </message>
       <message name="IDS_PAGE_INFO_SECURITY_TAB_DEPRECATED_SIGNATURE_ALGORITHM" desc="The text of the identity section when the site is using a certificate that will stop working in future versions of Chrome.">
-        The site is using outdated security settings that may prevent future versions of Chromium from being able to safely access it.
+        The certificate chain for this website contains at least one certificate that was signed using an outdated algorithm (SHA-1). This website should upgrade its certificates to avoid a downgraded lock icon.

[palmer, 2015/04/30 00:30:19]

Maybe "... (SHA-1 with RSA encryption)." to be more exact? To further reduce
confusion between this and HMAC-SHA1 as the MAC in the TLS ciphersuite.

On the other hand, it's longer. But on the third hand, that makes it more
searchable. I leave it up to you. :)

[lgarron, 2015/04/30 00:58:32]

Done.

I agree that more exact and explicit is definitely better at this point (and it
doesn't make the paragraph *much* longer in this case).

       </message>
 
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