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

chrome/browser/ui/validation_message_bubble.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_VALIDATION_MESSAGE_BUBBLE_H_
+#define CHROME_BROWSER_UI_VALIDATION_MESSAGE_BUBBLE_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.h"
+
+namespace content {
+class RenderWidgetHost;
+}
+
+namespace gfx {
+class Rect;
+}
+
+namespace chrome {
+
+class ValidationMessageBubble {
+ public:
+  // Open a tooltip-like window to show the specified messages.  The window
+  // should not change focus state.
+  static scoped_ptr<ValidationMessageBubble> CreateAndShow(
+      content::RenderWidgetHost* widget_host,
+      const gfx::Rect& anchor_in_screen,
+      const string16& main_text,
+      const string16& sub_text);
+
+  // Close the window and destruct the object.
+  virtual ~ValidationMessageBubble() {}
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_UI_VALIDATION_MESSAGE_BUBBLE_H_