Correct in-app copyright messages per new policy, matching source

chrome/app/chromium_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are distribution specific.
 These strings will not be translated and only english versions will
 be available for now. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 275 matching lines @@
       </if>
       <if expr="pp_ifdef('chromeos')">
         <message name="IDS_GET_HELP_USING_CHROME" desc="Text of the button which takes the user to the Chrome help page.">
           Get help with using Chromium OS
         </message>
       </if>
       <message name="IDS_ABOUT_VERSION_COMPANY_NAME" desc="Company name on the about pages">
         The Chromium Authors
       </message>
       <message name="IDS_ABOUT_VERSION_COPYRIGHT" desc="Copyright information on the about pages">
-        Copyright © 2006-2012 The Chromium Authors. All Rights Reserved.
+        Copyright 2012 The Chromium Authors. All rights reserved.
       </message>
       <message name="IDS_ABOUT_VERSION_LICENSE" desc="The label below the copyright message, containing the URLs.">
         Chromium is made possible by the <ph name="BEGIN_LINK_CHROMIUM">&lt;a target="_blank" href="$1"&gt;</ph>Chromium<ph name="END_LINK_CHROMIUM">&lt;/a&gt;</ph> open source project and other <ph name="BEGIN_LINK_OSS">&lt;a target="_blank" href="$2"&gt;</ph>open source software<ph name="END_LINK_OSS">&lt;/a&gt;</ph>.
       </message>
       <if expr="pp_ifdef('chromeos')">
         <message name="IDS_ABOUT_CROS_VERSION_LICENSE" desc="Additional text displayed beneath the Chromium open source URLs for Chrome OS.">
           Chromium OS is made possible by additional <ph name="BEGIN_LINK_CROS_OSS">&lt;a target="_blank" href="$1"&gt;</ph>open source software<ph name="END_LINK_CROS_OSS">&lt;/a&gt;</ph>.
         </message>
       </if>
       <message name="IDS_ABOUT_TERMS_OF_SERVICE" desc="The terms of service label in the About box.">
@@ skipping 578 matching lines @@
 
       <!-- Chrome OS keyboard overlay-->
       <if expr="pp_ifdef('chromeos')">
         <message name="IDS_KEYBOARD_OVERLAY_SHOW_WRENCH_MENU" desc="The text in the keyboard overlay to explain the shortcut that opens the main Chrome menu.">
           Show the Chromium menu
         </message>
       </if>
     </messages>
   </release>
 </grit>