Adds string for a prompt action button before making a phone call

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 611 matching lines @@
       </message>
       <message name="IDS_IOS_DOWNLOAD_MANAGER_UNABLE_TO_OPEN_FILE" desc="Title of dialog displayed when the user attempts to open a downloaded file and no app on the device can open the file. [Length: 25em] [iOS only]">
         Unable to Open File
       </message>
       <message name="IDS_IOS_DOWNLOAD_MANAGER_UPLOAD_TO_GOOGLE_DRIVE" desc="Button for uploading a downloaded file to Google Drive. It's displayed on the dialog presented when no app on the device can open the file. [Length: 25em] [iOS only]">
         Upload to Google Drive
       </message>
       <message name="IDS_IOS_FACETIME_BUTTON" desc="Text in the confirmation dialog button that will initiate a FaceTime call for the presented number. [Length: 10em] [iOS only]">
         FaceTime
       </message>
+      <message name="IDS_IOS_PHONE_CALL_BUTTON" desc="Text in the confirmation dialog button that will initiate a phone call for the presented number. [Length: 10em] [iOS only]">
+        Call
+      </message>
       <message name="IDS_IOS_FIRSTRUN_ACCOUNT_CONSISTENCY_SKIP_BUTTON" desc="Title of the button to skip the selection of an account on First Run when account consistency is enabled. [Length: 10em] [iOS only]">
         No thanks
       </message>
       <message name="IDS_IOS_FIRSTRUN_OPT_IN_ACCEPT_BUTTON" desc="User metrics opt-in acceptance button label [iOS only]">
         Accept &amp; Continue
       </message>
       <message name="IDS_IOS_GENERATED_PASSWORD_ACCEPT" desc="The text of the button that accepts the generated password. [Length: 20em] [iOS only]">
         Use Password
       </message>
       <message name="IDS_IOS_GENERATED_PASSWORD_PROMPT_DESCRIPTION" desc="The explanation text for the generated password prompt. [iOS only]">
@@ skipping 855 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>