First cut at Exit Fullscreen bubble on Linux.

chrome/chrome.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
@@ skipping 1521 matching lines @@
         'browser/gtk/external_protocol_dialog_gtk.cc',
         'browser/gtk/external_protocol_dialog_gtk.h',
         'browser/gtk/find_bar_gtk.cc',
         'browser/gtk/find_bar_gtk.h',
         'browser/gtk/first_run_bubble.cc',
         'browser/gtk/first_run_bubble.h',
         'browser/gtk/first_run_dialog.cc',
         'browser/gtk/first_run_dialog.h',
         'browser/gtk/focus_store_gtk.cc',
         'browser/gtk/focus_store_gtk.h',
+        'browser/gtk/fullscreen_exit_bubble_gtk.cc',
+        'browser/gtk/fullscreen_exit_bubble_gtk.h',
         'browser/gtk/go_button_gtk.cc',
         'browser/gtk/go_button_gtk.h',
         'browser/gtk/gtk_chrome_button.cc',
         'browser/gtk/gtk_chrome_button.h',
         'browser/gtk/gtk_chrome_link_button.cc',
         'browser/gtk/gtk_chrome_link_button.h',
         'browser/gtk/gtk_floating_container.cc',
         'browser/gtk/gtk_floating_container.h',
         'browser/gtk/gtk_theme_provider.cc',
         'browser/gtk/gtk_theme_provider.h',
@@ skipping 5464 matching lines @@
       ]
     }],
   ],  # 'conditions'
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: