Use BookmarkAppConfirmationView on Mac. Delete the NSAlert Mac uses currently.

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 1849 matching lines @@
 
       <!-- Dialog that asks whether user wants to participate in Safe Browsing Extended Reporting -->
       <message name="IDS_FEEDBACK_SERVICE_DIALOG_OK_BUTTON_LABEL" desc="Button that elects to upload suspected malicious files for analysis">
         Yes, I want to help
       </message>
       <message name="IDS_FEEDBACK_SERVICE_DIALOG_CANCEL_BUTTON_LABEL" desc="Button that elects not to upload suspected malicious files for analysis (default button)">
         No, thanks
       </message>
 
       <!-- Bookmark app bubble -->
-      <if expr="is_macosx">
-        <message name="IDS_ADD_TO_APPLICATIONS_BUBBLE_TITLE" desc="Title of the bubble adding a bookmark app to the Applications Folder.">
-          Add to Applications
-        </message>
-      </if>
       <if expr="use_ash">
         <message name="IDS_ADD_TO_SHELF_BUBBLE_TITLE" desc="Title of the bubble for adding a bookmark app to the shelf.">
           Add to shelf
         </message>
       </if>
       <if expr="not use_titlecase">
         <message name="IDS_ADD_TO_DESKTOP_BUBBLE_TITLE" desc="Title of the bubble for adding a bookmark app to the desktop.">
           Add to desktop
         </message>
       </if>
-      <if expr="use_titlecase">
+      <if expr="use_titlecase and not is_macosx">
         <message name="IDS_ADD_TO_DESKTOP_BUBBLE_TITLE" desc="Title of the bubble for adding a bookmark app to the desktop.">
           Add to Desktop
         </message>
       </if>
+      <if expr="is_macosx">
+        <message name="IDS_ADD_TO_DESKTOP_BUBBLE_TITLE" desc="Title of the bubble adding a bookmark app to the Applications Folder on Mac.">
+          Add to Applications
+        </message>
+      </if>
 
       <message name="IDS_BOOKMARK_APP_AX_BUBBLE_NAME_LABEL" desc="Text preceding the name of a bookmark app, read by spoken feedback.">
         Shortcut name
       </message>
       <message name="IDS_BOOKMARK_APP_BUBBLE_OPEN_AS_WINDOW" desc="Checkbox text for opening the bookmark app as a window.">
         Open as window
       </message>
 
       <!-- Quit all apps confirmation dialog -->
       <if expr="is_macosx">
@@ skipping 10412 matching lines @@
       <message name="IDS_VIDEO_AUDIO_CALL_NOTIFICATION_TEXT_2" desc="Text to be shown as a notification when a WebRTC video and audio call is in progress" formatter_data="android_java">
         Accessing audio and video input
       </message>
       <message name="IDS_SCREEN_CAPTURE_NOTIFICATION_TEXT_2" desc="Text to be shown as a notification when screen capture is in progress.">
         Sharing screen
       </message>
     </if>
   </messages>
  </release>
 </grit>