Mark untrusted certificates as such in Linux UI.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 4e6ecb960d8f4d2dae0fcb226b30b31eb9f6a23b..c9ed7b18bc369d33cd0b891685079fd362b1fe16 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -3335,6 +3335,9 @@ are declared in build/common.gypi.
       <message name="IDS_CERT_MANAGER_WRITE_ERROR_FORMAT" desc="The text in the error dialog for PKCS #12 file write errors.">
         There was an error while trying to write the file: <ph name="ERROR_TEXT">$1<ex>Permission denied.</ex></ph>.
       </message>
+      <message name="IDS_CERT_MANAGER_UNTRUSTED" desc="This text is displayed next to untrusted certificates in a red box. Untrusted certificates are sometimes added in order to explicitly disable them. Thus, they will be listed but it's important that the user note that serve a different purpose from the rest.">

[wtc, 2011/06/29 00:30:45]

Should
    that serve a different purpose
be
    they serve a different purpose
?

[agl, 2011/06/29 14:31:11]

Done.

+        untrusted

[wtc, 2011/06/29 00:30:45]

Should we capitalize "untrusted"?

[agl, 2011/06/29 14:31:11]

Done.

+      </message>
       <message name="IDS_CERT_MANAGER_PKCS12_IMPORT_ERROR_TITLE" desc="The title in the error dialog for PKCS #12 file import errors.">
         PKCS #12 Import Error
       </message>