gtk: Extract event functions into event_utils module.

chrome/chrome_browser.gypi

 # Copyright (c) 2012 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',
@@ skipping 2926 matching lines @@
         '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/event_utils.cc',
+        'browser/ui/gtk/event_utils.h',
         'browser/ui/gtk/extensions/bundle_installed_bubble_gtk.cc',
         'browser/ui/gtk/extensions/bundle_installed_bubble_gtk.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_keybinding_registry_gtk.cc',
         'browser/ui/gtk/extensions/extension_keybinding_registry_gtk.h',
         'browser/ui/gtk/extensions/extension_popup_gtk.cc',
         'browser/ui/gtk/extensions/extension_popup_gtk.h',
         'browser/ui/gtk/extensions/extension_uninstall_dialog_gtk.cc',
@@ skipping 2245 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }