Refine the accessibility label of Clear Browsing Data flow.

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 strings in this file are specific to iOS.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
@@ skipping 489 matching lines @@
       </message>
       <message name="IDS_IOS_CLEAR_BROWSING_DATA_TITLE" desc="Title for clear browsing data setting screen [Length: 10em] [iOS only]">
         Clear Browsing Data
       </message>
       <message name="IDS_IOS_CLEAR_BROWSING_HISTORY" desc="Label for the option in settings to clear browsing history. In titlecase. [Length: 20em] [iOS only]">
         Browsing History
       </message>
       <message name="IDS_IOS_CLEAR_BUTTON" desc="Title for the button used to clear data. [Length: 20em] [iOS only]">
         Clear Browsing Data
       </message>
+      <message name="IDS_IOS_CONFIRM_CLEAR_BUTTON" desc="Accessibility label for the action sheet button used to clear data. [iOS only]">

[lindsayw, 2017/03/16 18:49:52]

nit:

Can we please include specifically "confirm" in the desc here? Along the lines
of "...for the action sheet button used to confirm clearing data." or something
akin to that?

[lpromero, 2017/03/17 13:34:11]

Good call. Done.

+        Confirm Clear Browsing Data
+      </message>
       <message name="IDS_IOS_CLEAR_CACHE" desc="Label for the option in settings to clear the cache. In titlecase. [Length: 20em] [iOS only]">
         Cached Images and Files
       </message>
       <message name="IDS_IOS_CLEAR_COOKIES" desc="Label for the option in settings to clear cookies and site data. In titlecase. [Length: 20em] [iOS only]">
         Cookies, Site Data
       </message>
       <message name="IDS_IOS_CLEAR_SAVED_PASSWORDS" desc="Label for the option in settings to clear saved passwords. In titlecase. [Length: 20em] [iOS only]">
         Saved Passwords
       </message>
       <message name="IDS_IOS_CONTENT_CONTEXT_ADDTOREADINGLIST" desc="The iOS menu item for adding a link to the reading list.">
@@ skipping 989 matching lines @@
       </message>
       <message name="IDS_IOS_SIGNIN_PROMO_CONTINUE_AS" desc="Button that the user can press to login without asking the password and continue using Chrome with this acccount. [Length: 9em]">
         Continue as <ph name="NAME">$1<ex>John Doe</ex></ph>
       </message>
       <message name="IDS_IOS_SIGNIN_PROMO_NOT" desc="Button that the user can press if they are not the profile that Chrome found (opposite of 'Continue as Joe Doe').">
         Not <ph name="EMAIL">$1<ex>john.doe@example.com</ex>?</ph>
       </message>
     </messages>
   </release>
 </grit>