Re-implement form validation message UI with native widgets. (Common and Mac)

chrome/browser/ui/views/validation_message_bubble_view.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/validation_message_bubble.h"
+
+namespace chrome {
+
+scoped_ptr<ValidationMessageBubble> ValidationMessageBubble::CreateAndShow(
+    content::RenderWidgetHost* widget_host,
+    const gfx::Rect& anchor_in_screen,
+    const string16& main_text,
+    const string16& sub_text) {
+  // TODO(tkent): Implement this and enable it. crbug.com/235719.
+  return scoped_ptr<ValidationMessageBubble>().Pass();
+}
+
+}