Gender-neutralize a few more comments / strings.

components/components_chromium_strings.grd

 <?xml version="1.0" encoding="utf-8"?>
 
 <grit latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/components_chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="components_chromium_strings_am.pak" type="data_package" lang="am" />
     <output filename="components_chromium_strings_ar.pak" type="data_package" lang="ar" />
@@ skipping 170 matching lines @@
           &gt;
           <ph name="PROXIES_TITLE">&lt;span jscontent="proxyTitle"&gt;&lt;/span&gt;<ex>Change proxy settings...</ex></ph>
           &gt;
           LAN Settings
           and deselect the &quot;Use a proxy server for your LAN&quot; checkbox.
         </message>
       </if>
 
       <!-- About Flags UI -->
       <if expr="not chromeos">
-        <message name="IDS_FLAGS_UI_RELAUNCH_NOTICE" desc="Notifies the user that he needs to relaunch Chromium. Shown next to a button that says 'Relaunch Now'.">
+        <message name="IDS_FLAGS_UI_RELAUNCH_NOTICE" desc="Notifies the user that they need to relaunch Chromium. Shown next to a button that says 'Relaunch Now'.">
           Your changes will take effect the next time you relaunch Chromium.
         </message>
       </if>
       <if expr="chromeos">
-        <message name="IDS_FLAGS_UI_RELAUNCH_NOTICE" desc="Notifies the user that he needs to restart Chromium OS. Shown next to a button that says 'Restart Now'.">
+        <message name="IDS_FLAGS_UI_RELAUNCH_NOTICE" desc="Notifies the user that they need to restart Chromium OS. Shown next to a button that says 'Restart Now'.">
           Your changes will take effect the next time you restart your device.
         </message>
       </if>
 
       <!-- chrome://crashes strings -->
       <message name="IDS_CRASH_DISABLED_MESSAGE" desc="The explanatory message for chrome://crashes when crash reporting is disabled">
         Crash reporting is not available in Chromium.
       </message>
 
       <!-- Version UI -->
       <message name="IDS_VERSION_UI_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>
 
       <!-- Page Info bubble -->
       <message name="IDS_PAGE_INFO_INTERNAL_PAGE" desc="Message to display in the page info bubble when the page you are on is a chrome:// page or about:something.">
         You are viewing a secure Chromium page.
       </message>
 
       <message name="IDS_SESSION_CRASHED_VIEW_MESSAGE" desc="Message shown when the last session didn't exit cleanly.">
         Chromium didn't shut down correctly.
       </message>
     </messages>
   </release>
 </grit>