a11y: Add a11y information to views::Tab and manually ignore its a11y children.

ui/strings/ui_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. Specifically, these are UI strings that are used by app/ that
 need to be translated for each locale.-->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <!-- TODO add each of your output files.  Modify the three below, and add
@@ skipping 253 matching lines @@
       <message name="IDS_PAST_TIME_YESTERDAY" desc="Relative day yesterday">
         Yesterday
       </message>
 
       <!-- Menus -->
       <message name="IDS_APP_MENU_EMPTY_SUBMENU" desc="Used when a submenu has no entries">
         (empty)
       </message>
 
       <!-- General application strings -->
+      <if expr="is_macosx">
+        <message name="IDS_ACCNAME_TAB" desc="A generic description of a tab button's role" meaning="UI element">

[tapted, 2017/01/06 04:25:11]

I think this should be grouped with "Accessible name strings" on line 325.

and for the name itself, we should probably update it to something more
descriptive. E.g.

IDS_ACCNAME_TAB_ROLE_DESCRIPTION

[Patti Lor, 2017/01/09 22:39:27]

Done.

+          Tab
+        </message>
+      </if>
       <if expr="is_win or is_ios">
         <message name="IDS_APP_UNTITLED_SHORTCUT_FILE_NAME" desc="The name of the Internet Shortcut file created for URLs dragged that have no title">
           Untitled Webpage
         </message>
       </if>
       <if expr="is_win or is_macosx">
         <message name="IDS_APP_SAVEAS_ALL_FILES" desc="Save As dialog box default text">
           All Files
         </message>
         <message name="IDS_APP_SAVEAS_EXTENSION_FORMAT" desc="Save As dialog box extension format text">
@@ skipping 384 matching lines @@
       </message>
       <message name="IDS_DISPLAY_NAME_INTERNAL" desc="The name used for internal displays, which is shown in the display settings.">
         Internal Display
       </message>
       <message name="IDS_DISPLAY_NAME_VIRTUAL" desc="The name used for virtual displays, which is shown in the display settings. Virtual displays are not associated with a physical monitor.">
         Virtual Display
       </message>
     </messages>
   </release>
 </grit>