MessageBubble which does not require separate window and does not grab input on mouse press event.

chrome/browser/chromeos/login/message_bubble.h

 // Copyright (c) 2010 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_CHROMEOS_LOGIN_MESSAGE_BUBBLE_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_MESSAGE_BUBBLE_H_
 
 #include "chrome/browser/views/info_bubble.h"
 #include "views/controls/button/button.h"
 #include "views/view.h"
+#include "views/widget/widget_gtk.h"
 
 class SkBitmap;
 
 namespace views {
 class ImageButton;
 class ImageView;
 class Label;
 }
 
 namespace chromeos {
 
 // MessageBubble is used to show error and info messages on OOBE screens.
 class MessageBubble : public InfoBubble,
                       public views::ButtonListener {
  public:
   // Create and show bubble. position_relative_to must be in screen coordinates.
   static MessageBubble* Show(views::Widget* parent,
                              const gfx::Rect& position_relative_to,
                              BubbleBorder::ArrowLocation arrow_location,
                              SkBitmap* image,
                              const std::wstring& text,
                              InfoBubbleDelegate* delegate);
 
-  // Overridden from WidgetWin
+  // Create and show bubble which does not grab pointer.  This creates
+  // a TYPE_CHILD WidgetGtk and |position_relative_to| must be in parent's
+  // coordinates.
+  static MessageBubble* ShowNoGrab(views::Widget* parent,
+                                   const gfx::Rect& position_relative_to,
+                                   BubbleBorder::ArrowLocation arrow_location,
+                                   SkBitmap* image,
+                                   const std::wstring& text,
+                                   InfoBubbleDelegate* delegate);
+
+  // Overridden from WidgetGtk.
   virtual void Close();
 
  protected:
+
+  // views::ButtonListener implmenets.
   virtual void ButtonPressed(views::Button* sender,
                              const views::Event& event);
 
+  // Overridden from WidgetGtk.
   virtual void IsActiveChanged();
+  virtual void DoGrab();
 
  private:
-  MessageBubble(views::Widget* parent, SkBitmap* image,
-                const std::wstring& text);
+  MessageBubble(views::WidgetGtk::Type type,
+                views::Widget* parent, SkBitmap* image,
+                const std::wstring& text, bool grab_enabled);
 
   views::Widget* parent_;
   views::ImageView* icon_;
   views::Label* text_;
   views::ImageButton* close_button_;
+  bool grab_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageBubble);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_MESSAGE_BUBBLE_H_