Remove use_name_for_id from ios_strings.grd to unblock translation process.

ios/chrome/app/strings/ios_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definition of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, is_ios and is_posix are
 available for making strings OS specific.  Other platform defines such as
 use_titlecase are declared in build/common.gypi.
 
 The strings in this file are specific to iOS, thus is_ios will be true and
 all other OS specific variables will be false.
@@ skipping 113 matching lines @@
     <file path="resources/ios_strings_th.xtb" lang="th" />
     <file path="resources/ios_strings_tr.xtb" lang="tr" />
     <file path="resources/ios_strings_uk.xtb" lang="uk" />
     <file path="resources/ios_strings_vi.xtb" lang="vi" />
     <file path="resources/ios_strings_zh-CN.xtb" lang="zh-CN" />
     <file path="resources/ios_strings_zh-TW.xtb" lang="zh-TW" />
   </translations>
   <release seq="1" allow_pseudo="false">
     <messages fallback_to_english="true">
       <!-- The default value for HTTP Accept-Language header. -->
-      <message name="IDS_IOS_ACCEPT_LANGUAGES" use_name_for_id="true">
+      <message name="IDS_IOS_ACCEPT_LANGUAGES" translateable="false">
         en-US,en
       </message>
 
       <!-- The default value for |WebPreference::default_encoding|. -->
-      <message name="IDS_IOS_DEFAULT_ENCODING" use_name_for_id="true">
+      <message name="IDS_IOS_DEFAULT_ENCODING" translateable="false">
         windows-1252
       </message>
 
       <message name="IDS_IOS_AUTOFILL_ACCNAME_HIDE_KEYBOARD" desc="The accessible name for the hide keyboard button in the keyboard accessory shown when filling out forms. [Length: unlimited] [iOS only]">
         Hide keyboard
       </message>
       <message name="IDS_IOS_AUTOFILL_ACCNAME_NEXT_FIELD" desc="The accessible name for the next field button in the keyboard accessory shown when filling out forms. [Length: unlimited] [iOS only]">
         Next field
       </message>
       <message name="IDS_IOS_AUTOFILL_ACCNAME_PREVIOUS_FIELD" desc="The accessible name for the previous field button in the keyboard accessory shown when filling out forms. [Length: unlimited] [iOS only]">
@@ skipping 22 matching lines @@
       </message>
       <message name="IDS_IOS_LOCATION_USAGE_CANCEL" desc="Title for the alert button to cancel sending location for Omnibox queries [Length: 20em] [iOS only]">
         Not Now
       </message>
       <message name="IDS_IOS_VERSION_COPIED" desc="The message displayed when the version label is tapped (in About settings) [Length: 10em] [iOS only]">
         Copied
       </message>
     </messages>
   </release>
 </grit>