gtk: Split DownloadShelfContextMenuGtk out to its own header file.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2631 matching lines @@
         'browser/ui/gtk/crypto_module_password_dialog.cc',
         'browser/ui/gtk/custom_button.cc',
         'browser/ui/gtk/custom_button.h',
         'browser/ui/gtk/custom_drag.cc',
         'browser/ui/gtk/custom_drag.h',
         'browser/ui/gtk/dialogs_gtk.cc',
         'browser/ui/gtk/download/download_in_progress_dialog_gtk.cc',
         'browser/ui/gtk/download/download_in_progress_dialog_gtk.h',
         'browser/ui/gtk/download/download_item_gtk.cc',
         'browser/ui/gtk/download/download_item_gtk.h',
+        'browser/ui/gtk/download/download_shelf_context_menu_gtk.cc',
+        'browser/ui/gtk/download/download_shelf_context_menu_gtk.h',
         'browser/ui/gtk/download/download_shelf_gtk.cc',
         'browser/ui/gtk/download/download_shelf_gtk.h',
         'browser/ui/gtk/download/download_started_animation_gtk.cc',
         'browser/ui/gtk/edit_search_engine_dialog.cc',
         'browser/ui/gtk/edit_search_engine_dialog.h',
         'browser/ui/gtk/extensions/extension_install_dialog_gtk.cc',
         'browser/ui/gtk/extensions/extension_installed_bubble_gtk.cc',
         'browser/ui/gtk/extensions/extension_installed_bubble_gtk.h',
         'browser/ui/gtk/extensions/extension_popup_gtk.cc',
         'browser/ui/gtk/extensions/extension_popup_gtk.h',
@@ skipping 1922 matching lines @@
       'hard_dependency': 1,
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: