[M56] Revert "Enable Initialization of the Task Scheduler by Default in the Browser 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 233 matching lines @@
       </message>
       <message name="IDS_IOS_ACCNAME_VOICE_SEARCH" desc="The accessibility label for the voice search button in the location bar [Length: unlimited]">
         Voice Search
       </message>
 
       <!-- The URL for Google Chrome privacy policy. -->
       <message name="IDS_IOS_PRIVACY_POLICY_URL" translateable="false">
         http://www.google.com/intl/[GRITLANGCODE]/chrome/browser/privacy/
       </message>
 
-      <!-- Task Scheduler -->
+      <!-- Browser Task Scheduler -->
       <message name="IDS_IOS_FLAGS_BROWSER_TASK_SCHEDULER_NAME"
-               desc="Name of about:flag option to control redirection to the task scheduler."
+               desc="Name of about:flag option to control the availability of the browser task scheduler."
                translateable="false">
-        Task Scheduler
+        Browser Task Scheduler
       </message>
       <message name="IDS_IOS_FLAGS_BROWSER_TASK_SCHEDULER_DESCRIPTION"
-               desc="Description of about:flag option to control redirection to the task scheduler."
+               desc="Description of about:flag option to control the availability of the browser task scheduler."
                translateable="false">
-        Enables redirection of some task posting APIs to the task scheduler.
+        Enables the browser task scheduler to dispatch tasks instead of the existing worker pools. The browser task scheduler will only be used if variation parameters are available.
       </message>
 
     </messages>
   </release>
 </grit>