[Mac] Added Accessibility Labels to the Default Touch Bar

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="utf-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 1914 matching lines @@
         </if>
       </if>
 
       <!-- Touch Bar-->
       <if expr="is_macosx">
         <message name="IDS_TOUCH_BAR_GOOGLE_SEARCH"
                    desc="Text for the search button in the touch bar when Google is the default search provider. Pressing the button will bring focus to the omnibox.">
           Search or type URL
         </message>
         <message name="IDS_TOUCH_BAR_SEARCH"
-                   desc="Text for the search button in the touch bar when Google is not the default search provider. Pressing the button will bring focus to the omnibox.">
-          Search $1
+                   desc="Text for the search button in the touch bar when Google is not the default search provider. Pressing the button will bring focus to the omnibox. $1 is the name of the search provider)">
+          Search <ph name="SEARCH_ENGINE">$1<ex>Bing</ex></ph>
         </message>
 
+        <message name="IDS_TOOLTIP_TOUCH_BAR_BACK" desc="The tooltip for the touch bar back button.">
+        Touch to go back.
+        </message>
+        <message name="IDS_TOOLTIP_TOUCH_BAR_FORWARD" desc="The tooltip for the touch bar forward button.">
+        Touch to go forward.
+        </message>
       </if>
 
       <!-- Remove in-progress downloads confirmation dialog -->
       <if expr="not is_macosx">
       <message name="IDS_DOWNLOAD_REMOVE_CONFIRM_TITLE" desc="Title of the dialog asking for user confirmation to close the browser or the last incognito window when one or more downloads are in progress. If necessary, add '#' for plural cases. [ICU Syntax]">
       {NUM_DOWNLOAD, plural,
        =1 {Download in progress} other {Downloads in progress}}
       </message>
       <message name="IDS_DOWNLOAD_REMOVE_CONFIRM_OK_BUTTON_LABEL" desc="Button text for canceling the downloads and closing the browser or the last incognito window when one or more downloads are in progress. If necessary, add '#' for plural cases. [ICU Syntax]">
       {NUM_DOWNLOAD, plural,
@@ skipping 10454 matching lines @@
       Your downloads appear here
     </message>
 
     <!-- Automation info bar -->
     <message name="IDS_CONTROLLED_BY_AUTOMATION" desc="Message shown when the browser session is being controlled by an automated test.">
       Chrome is being controlled by automated test software.
     </message>
   </messages>
  </release>
 </grit>