Fix support for accessible action verbs and performing the default action.

content/app/strings/content_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 content that
 need to be translated for each locale.-->
 
 <!-- Some of these strings and string descriptions were taken from
 WebKit/win/WebCoreLocalizedStrings.cpp so we include the original license
 below:
 
@@ skipping 508 matching lines @@
       </message>
       <message name="IDS_AX_CHECKED_CHECK_BOX_ACTION_VERB" desc="Verb stating the action that will occur when a checked checkbox is clicked, as used by accessibility.">
         uncheck
       </message>
       <message name="IDS_AX_UNCHECKED_CHECK_BOX_ACTION_VERB" desc="Verb stating the action that will occur when an unchecked checkbox is clicked, as used by accessibility.">
         check
       </message>
       <message name="IDS_AX_LINK_ACTION_VERB" desc="Verb stating the action that will occur when a link is clicked, as used by accessibility.">
         jump
       </message>
+      <message name="IDS_AX_POP_UP_BUTTON_ACTION_VERB" desc="Verb stating the action that will occur when a pop-up button is clicked, as used by accessibility.">
+        open
+      </message>
+      <message name="IDS_AX_DEFAULT_ACTION_VERB" desc="Verb stating the action that will occur when clicking on a generic clickable object, when we don't know what that action is, as used by accessibility.">
+        click
+      </message>
 
       <message name="IDS_AX_AM_PM_FIELD_TEXT" desc="Accessible description of the AM/PM field in a date/time control">
         AM/PM
       </message>
 
       <message name="IDS_AX_DAY_OF_MONTH_FIELD_TEXT" desc="Accessible description of the day of month field in a date/time control">
         Day
       </message>
 
       <message name="IDS_AX_DATE_TIME_FIELD_EMPTY_VALUE_TEXT" desc="Accessible description of empty value of field in a date/time control">
@@ skipping 60 matching lines @@
         exit full screen
       </message>
 
       <message name="IDS_AX_MEDIA_SHOW_CLOSED_CAPTIONS_BUTTON" desc="accessibility role description for show closed captions button">
         show closed captions
       </message>
 
       <message name="IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON" desc="accessibility role description for hide closed captions button">
         hide closed captions
       </message>
-      
+
       <message name="IDS_AX_MEDIA_CAST_OFF_BUTTON" desc="accessibility role description for remote playback button">
         play on remote device
       </message>
-      
+
       <message name="IDS_AX_MEDIA_CAST_ON_BUTTON" desc="accessibility role description for remote playback control button">
         control remote playback
       </message>
 
       <message name="IDS_AX_MEDIA_AUDIO_ELEMENT_HELP" desc="Accessible help of audio controls">
         audio
       </message>
 
       <message name="IDS_AX_MEDIA_VIDEO_ELEMENT_HELP" desc="Accessible help of video">
         video
@@ skipping 51 matching lines @@
         start displaying closed captions
       </message>
 
       <message name="IDS_AX_MEDIA_HIDE_CLOSED_CAPTIONS_BUTTON_HELP" desc="accessibility help description for hide closed captions button">
         stop displaying closed captions
       </message>
 
       <message name="IDS_AX_MEDIA_CAST_OFF_BUTTON_HELP" desc="accessibility help description for remote playback button">
         play on remote device
       </message>
-      
+
       <message name="IDS_AX_MEDIA_CAST_ON_BUTTON_HELP" desc="accessibility help description for remote playback control button">
         control remote playback
       </message>
 
       <message name="IDS_AX_MILLISECOND_FIELD_TEXT" desc="Accessible description of the millisecond field in a date/time control">
         Milliseconds
       </message>
 
       <message name="IDS_AX_MINUTE_FIELD_TEXT" desc="Accessible description of the minute field in a date/time control">
         Minutes
@@ skipping 151 matching lines @@
         Please lengthen this text to <ph name="MIN_CHARACTERS">$2<ex>101</ex></ph> characters or more (you are currently using <ph name="CURRENT_LENGTH">$1<ex>100</ex></ph> characters).
       </message>
 
       <message name="IDS_PLUGIN_INITIALIZATION_ERROR" desc="A message displayed when a plugin failed to load">
         Couldn't load plugin.
       </message>
 
     </messages>
   </release>
 </grit>