Add a Cocoa version of the auto-dismissing dialog.

chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc

Index: chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc
diff --git a/chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc b/chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc
index 88ddb3606c54a3768827f2300345fcedd8613735..1a8d13b201ad008babaad90d3fe2d7bcbb3bd2ca 100644
--- a/chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc
+++ b/chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc
@@ -11,7 +11,6 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
-#include "chrome/browser/ui/javascript_dialogs/javascript_dialog_views.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "components/app_modal/javascript_dialog_manager.h"
@@ -99,8 +98,7 @@ void JavaScriptDialogTabHelper::RunJavaScriptDialog(
         AppModalDialogManager()->GetTitle(alerting_web_contents, origin_url);
     dialog_callback_ = callback;
     BrowserList::AddObserver(this);
-    // TODO(avi): abstract out so that we have a Mac version too...
-    dialog_ = JavaScriptDialogViews::Create(
+    dialog_ = JavaScriptDialog::Create(
         parent_web_contents, alerting_web_contents, title, message_type,
         message_text, default_prompt_text, callback);