Mark untrusted certificates as such in Linux UI.

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 3335 matching lines @@
       </message>
       <message name="IDS_CERT_MANAGER_PKCS12_FILES" desc="The label in the file selector dialog for PKCS #12 file type.">
         PKCS #12 Files
       </message>
       <message name="IDS_CERT_MANAGER_PKCS12_EXPORT_ERROR_TITLE" desc="The title in the error dialog for PKCS #12 file export errors.">
         PKCS #12 Export Error
       </message>
       <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 distrust them. Thus, they will be listed but it's important that the user note that they serve a different purpose from the rest.">
+        Untrusted
+      </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>
       <message name="IDS_CERT_MANAGER_PKCS12_IMPORT_INVALID_MAC" desc="The message in the error dialog for PKCS #12 files with invalid MAC.">
         Incorrect password or corrupt file.
       </message>
       <message name="IDS_CERT_MANAGER_PKCS12_IMPORT_INVALID_FILE" desc="The message in the error dialog for corrupt PKCS #12 files.">
         Invalid or corrupt file.
       </message>
       <message name="IDS_CERT_MANAGER_PKCS12_IMPORT_UNSUPPORTED" desc="The message in the error dialog for unsupported PKCS #12 files.">
@@ skipping 10379 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
   </release>
 </grit>