Remove the last vestiges of RC4.

components/error_page_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
 
   <message name="IDS_ERRORPAGE_NET_BUTTON_DETAILS" desc="Label for the button that expands the details on a net error page">
     Details
   </message>
   <message name="IDS_ERRORPAGE_NET_BUTTON_HIDE_DETAILS" desc="Label for the button that hides the details on a net error page">
     Hide details
   </message>
   <message name="IDS_ERRORPAGES_BUTTON_MORE" desc="Label for the button that expands the details on an error page">
@@ skipping 78 matching lines @@
   <message name="IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_HEADER" desc="When a webpage fails to load, sometimes we suggest to the user to view the current policies.  This is a header above some instructions.">
     Check your administrator's policies
   </message>
   <message name="IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_BODY" desc="When a webpage fails to load, sometimes we suggest to the user to view the current policies.  These are instructions below a header.">
     Visit &lt;strong&gt;chrome://policy&lt;/strong&gt; to see the list of blacklisted URLs and other policies enforced by your system administrator.
   </message>
   <message name="IDS_ERRORPAGES_SUGGESTION_UNSUPPORTED_CIPHER_HEADER" desc="This is the header displayed above the explanation for SSL cipher and version errors.">
     Unsupported protocol
   </message>
   <message name="IDS_ERRORPAGES_SUGGESTION_UNSUPPORTED_CIPHER_BODY" desc="The detailed explanation body text displayed for SSL cipher and version errors.">
-    The client and server don't support a common SSL protocol version or cipher suite. This is likely to be caused when the server needs RC4, which is no longer considered secure.
+    The client and server don't support a common SSL protocol version or cipher suite.
   </message>
   <message name="IDS_ERRORPAGES_TITLE_NOT_AVAILABLE" desc="Title of the error page when we can't connect to a site.">
     <ph name="SITE">$1<ex>google.com</ex></ph> is not available
   </message>
   <message name="IDS_ERRORPAGES_TITLE_ACCESS_DENIED" desc="Title in the error page when a server returns a 403.  Also suitable for similar error codes.">
     Access to <ph name="URL">$1<ex>http://www.google.com/foo/bar</ex></ph> denied.
   </message>
   <message name="IDS_ERRORPAGES_TITLE_NOT_FOUND" desc="Title of the error page when the server returns a 404 or 410.">
     <ph name="URL">$1<ex>http://www.google.com/foo/bar</ex></ph> is not found
   </message>
@@ skipping 425 matching lines @@
     </message>
     <message name="IDS_ERRORPAGES_DETAILS_UNSAFE_PORT" desc="Details error message to tell user that the requested port is blocked as unsafe [Length: 20em]">
       Unsafe port blocked.
     </message>
     <message name="IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE_NO_EMPHASIS" desc="Summary in the error page when we can't connect to a site. [iOS only]">
       The webpage at <ph name="SITE">$1<ex>google.xom</ex></ph> might be temporarily down or it may have moved permanently to a new web address.
     </message>
   </if>
 
 </grit-part>