Make sure manifest specified shortcut for Extension Command can not override the built-in shortcuts.

chrome/chrome_browser_ui.gypi

 # Copyright 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_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 48 matching lines @@
         '<(INTERMEDIATE_DIR)',
         # Needed by pepper_flash_component_installer.cc.
         '<(SHARED_INTERMEDIATE_DIR)',
       ],
       'export_dependent_settings': [
         '../sync/sync.gyp:sync',
       ],
       'sources': [
         # All .cc, .h, .m, and .mm files under browser/ui except for:
         # * tests and mocks.
+        'browser/ui/accelerator_utils.h',
         'browser/ui/active_tab_tracker.cc',
         'browser/ui/active_tab_tracker.h',
         'browser/ui/alternate_error_tab_observer.cc',
         'browser/ui/alternate_error_tab_observer.h',
         'browser/ui/android/android_about_app_info.cc',
         'browser/ui/android/android_about_app_info.h',
         'browser/ui/android/autofill/autofill_dialog_view_android.cc',
         'browser/ui/android/autofill/autofill_dialog_view_android.h',
         'browser/ui/android/autofill/autofill_popup_view_android.cc',
         'browser/ui/android/autofill/autofill_popup_view_android.h',
@@ skipping 238 matching lines @@
         'browser/ui/browser_window_state.cc',
         'browser/ui/browser_window_state.h',
         'browser/ui/certificate_dialogs.cc',
         'browser/ui/certificate_dialogs.h',
         'browser/ui/chrome_pages.cc',
         'browser/ui/chrome_pages.h',
         'browser/ui/chrome_select_file_policy.cc',
         'browser/ui/chrome_select_file_policy.h',
         'browser/ui/chrome_style.cc',
         'browser/ui/chrome_style.h',
+        'browser/ui/cocoa/accelerator_utils_cocoa.mm',
         'browser/ui/cocoa/about_ipc_controller.h',
         'browser/ui/cocoa/about_ipc_controller.mm',
         'browser/ui/cocoa/about_ipc_dialog.h',
         'browser/ui/cocoa/about_ipc_dialog.mm',
         'browser/ui/cocoa/accelerators_cocoa.h',
         'browser/ui/cocoa/accelerators_cocoa.mm',
         'browser/ui/cocoa/animatable_image.h',
         'browser/ui/cocoa/animatable_image.mm',
         'browser/ui/cocoa/animatable_view.h',
         'browser/ui/cocoa/animatable_view.mm',
@@ skipping 563 matching lines @@
         'browser/ui/fullscreen/fullscreen_exit_bubble_type.h',
         'browser/ui/gesture_prefs_observer_factory_aura.cc',
         'browser/ui/gesture_prefs_observer_factory_aura.h',
         'browser/ui/global_error/global_error.cc',
         'browser/ui/global_error/global_error.h',
         'browser/ui/global_error/global_error_bubble_view_base.h',
         'browser/ui/global_error/global_error_service.cc',
         'browser/ui/global_error/global_error_service.h',
         'browser/ui/global_error/global_error_service_factory.cc',
         'browser/ui/global_error/global_error_service_factory.h',
+        'browser/ui/gtk/accelerator_utils_gtk.cc',
         'browser/ui/gtk/accelerators_gtk.cc',
         'browser/ui/gtk/accelerators_gtk.h',
         'browser/ui/gtk/action_box_button_gtk.cc',
         'browser/ui/gtk/action_box_button_gtk.h',
         'browser/ui/gtk/autofill/autofill_popup_view_gtk.cc',
         'browser/ui/gtk/autofill/autofill_popup_view_gtk.h',
         'browser/ui/gtk/avatar_menu_bubble_gtk.cc',
         'browser/ui/gtk/avatar_menu_bubble_gtk.h',
         'browser/ui/gtk/avatar_menu_button_gtk.cc',
         'browser/ui/gtk/avatar_menu_button_gtk.h',
@@ skipping 421 matching lines @@
         'browser/ui/status_bubble.h',
         'browser/ui/sync/browser_synced_window_delegate.h',
         'browser/ui/sync/browser_synced_window_delegate.cc',
         'browser/ui/sync/one_click_signin_helper.cc',
         'browser/ui/sync/one_click_signin_helper.h',
         'browser/ui/sync/one_click_signin_histogram.h',
         'browser/ui/sync/one_click_signin_infobar_delegate.cc',
         'browser/ui/sync/one_click_signin_infobar_delegate.h',
         'browser/ui/sync/one_click_signin_sync_starter.cc',
         'browser/ui/sync/one_click_signin_sync_starter.h',
-        'browser/ui/sync/profile_signin_confirmation_helper.cc',
-        'browser/ui/sync/profile_signin_confirmation_helper.h',
+        'browser/ui/sync/profile_signin_confirmation_helper.cc',
+        'browser/ui/sync/profile_signin_confirmation_helper.h',
         'browser/ui/sync/signin_histogram.h',
         'browser/ui/sync/tab_contents_synced_tab_delegate.cc',
         'browser/ui/sync/tab_contents_synced_tab_delegate.h',
         'browser/ui/tab_contents/chrome_web_contents_view_delegate.h',
         'browser/ui/tab_contents/core_tab_helper.cc',
         'browser/ui/tab_contents/core_tab_helper.h',
         'browser/ui/tab_contents/core_tab_helper_delegate.cc',
         'browser/ui/tab_contents/core_tab_helper_delegate.h',
         'browser/ui/tab_contents/tab_contents_iterator.cc',
         'browser/ui/tab_contents/tab_contents_iterator.h',
@@ skipping 54 matching lines @@
         'browser/ui/toolbar/wrench_menu_model.cc',
         'browser/ui/toolbar/wrench_menu_model.h',
         'browser/ui/top_level_widget.h',
         'browser/ui/uma_browsing_activity_observer.cc',
         'browser/ui/uma_browsing_activity_observer.h',
         'browser/ui/uninstall_browser_prompt.h',
         'browser/ui/unload_controller.cc',
         'browser/ui/unload_controller.h',
         'browser/ui/user_data_dir_dialog.h',
         'browser/ui/view_ids.h',
+        'browser/ui/views/accelerator_utils_aura.cc',
+        'browser/ui/views/accelerator_utils_views.cc',
         'browser/ui/views/about_ipc_dialog.cc',
         'browser/ui/views/about_ipc_dialog.h',
         'browser/ui/views/accessibility/accessibility_event_router_views.cc',
         'browser/ui/views/accessibility/accessibility_event_router_views.h',
         'browser/ui/views/accessibility/invert_bubble_view.cc',
         'browser/ui/views/accessibility/invert_bubble_view.h',
         'browser/ui/views/action_box_context_menu.cc',
         'browser/ui/views/action_box_context_menu.h',
         'browser/ui/views/action_box_menu.cc',
         'browser/ui/views/action_box_menu.h',
@@ skipping 1445 matching lines @@
         }],
         ['enable_message_center==1', {
           'dependencies': [
             '../ui/message_center/message_center.gyp:message_center',
           ],
         }],
       ],
     },
   ],
 }