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diff --git a/chromium/ash/popup_message.h b/chromium/ash/popup_message.h
new file mode 100644
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+++ b/chromium/ash/popup_message.h
@@ -0,0 +1,83 @@
+// Copyright 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 ASH_POPUP_MESSAGE_H_
+#define ASH_POPUP_MESSAGE_H_
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+#include "base/strings/string16.h"
+#include "ui/gfx/rect.h"
+#include "ui/views/bubble/bubble_border.h"
+
+namespace views {
+class BubbleDelegateView;
+}
+
+namespace ash {
+
+// PopupMessage shows a message to the user. Since the user is not able to
+// dismiss it, the calling code needs to explictly close and destroy it.
+class ASH_EXPORT PopupMessage {
+ public:
+  enum IconType {
+    ICON_WARNING,
+    ICON_NONE
+  };
+
+  // Creates a message pointing towards |anchor| with the requested
+  // |arrow_orientation|. The message contains an optional |caption| which is
+  // drawn in bold and an optional |message| together with an optional icon of
+  // shape |message_type|. If a component in |size_override| is not 0 the value
+  // is the used as output size. If |arrow_offset| is not 0, the number is the
+  // arrow offset in pixels from the border.
+  //
+  // Here is the layout (arrow given as TOP_LEFT):
+  //                    |--------|
+  //                    | Anchor |
+  //                    |--------|
+  //       |-arrow_offset---^
+  //       +-------------------------------------------------+
+  //      -|                                                 |-
+  //  icon |  [!]  Caption in bold which can be multi line   | caption_label
+  //      -|                                                 |-
+  //       |       Message text which can be multi line      | message_label
+  //       |       as well.                                  |
+  //       |                                                 |-
+  //       +-------------------------------------------------+
+  PopupMessage(const base::string16& caption,
+               const base::string16& message,
+               IconType message_type,
+               views::View* anchor,
+               views::BubbleBorder::Arrow arrow,
+               const gfx::Size& size_override,
+               int arrow_offset);
+  // If the message was not explicitly closed before, it closes the message
+  // without animation.
+  virtual ~PopupMessage();
+
+  // Closes the message with a fade out animation.
+  void Close();
+
+ private:
+  class MessageBubble;
+
+  void CancelHidingAnimation();
+
+  MessageBubble* view_;
+  views::Widget* widget_;
+
+  // Variables of the construction time.
+  views::View* anchor_;
+  base::string16 caption_;
+  base::string16 message_;
+  IconType message_type_;
+  views::BubbleBorder::Arrow arrow_orientation_;
+
+  DISALLOW_COPY_AND_ASSIGN(PopupMessage);
+};
+
+}  // namespace ash
+
+#endif  // ASH_POPUP_MESSAGE_H_