Adding a message box to confirm if the user really wants to delete all stored...

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,
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 1555 matching lines @@
         'browser/views/browser_bubble_win.cc',
         'browser/views/browser_dialogs.h',
         'browser/views/bug_report_view.cc',
         'browser/views/bug_report_view.h',
         'browser/views/chrome_views_delegate.cc',
         'browser/views/chrome_views_delegate.h',
         'browser/views/clear_browsing_data.cc',
         'browser/views/clear_browsing_data.h',
         'browser/views/constrained_window_win.cc',
         'browser/views/constrained_window_win.h',
+        'browser/views/confirm_message_box_dialog.cc',
+        'browser/views/confirm_message_box_dialog.h',
         'browser/views/dialog_stubs_gtk.cc',
         'browser/views/dom_view.cc',
         'browser/views/dom_view.h',
         'browser/views/download_item_view.cc',
         'browser/views/download_item_view.h',
         'browser/views/download_shelf_view.cc',
         'browser/views/download_shelf_view.h',
         'browser/views/download_started_animation_win.cc',
         'browser/views/edit_search_engine_dialog.cc',
         'browser/views/edit_search_engine_dialog.h',
@@ skipping 3369 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }