Allow Widget to pass accelerator handling to its parent.

ui/views/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 import("//ui/ozone/ozone.gni")
 
@@ skipping 59 matching lines @@
     "cocoa/bridged_native_widget.h",
     "cocoa/bridged_native_widget.mm",
     "cocoa/bridged_native_widget_owner.h",
     "cocoa/cocoa_mouse_capture.h",
     "cocoa/cocoa_mouse_capture.mm",
     "cocoa/cocoa_mouse_capture_delegate.h",
     "cocoa/cocoa_window_move_loop.h",
     "cocoa/cocoa_window_move_loop.mm",
     "cocoa/drag_drop_client_mac.h",
     "cocoa/drag_drop_client_mac.mm",
+    "cocoa/native_widget_mac_accelerator_handler.h",
+    "cocoa/native_widget_mac_accelerator_handler.mm",
     "cocoa/native_widget_mac_nswindow.h",
     "cocoa/native_widget_mac_nswindow.mm",
     "cocoa/tooltip_manager_mac.h",
     "cocoa/tooltip_manager_mac.mm",
     "cocoa/views_nswindow_delegate.h",
     "cocoa/views_nswindow_delegate.mm",
     "cocoa/views_scrollbar_bridge.h",
     "cocoa/views_scrollbar_bridge.mm",
     "cocoa/widget_owner_nswindow_adapter.h",
     "cocoa/widget_owner_nswindow_adapter.mm",
@@ skipping 258 matching lines @@
     "widget/native_widget_mac.mm",
     "widget/native_widget_private.h",
     "widget/root_view.cc",
     "widget/root_view.h",
     "widget/root_view_targeter.cc",
     "widget/root_view_targeter.h",
     "widget/tooltip_manager.cc",
     "widget/tooltip_manager.h",
     "widget/widget.cc",
     "widget/widget.h",
+    "widget/widget_accelerator_handling_delegate.cc",
+    "widget/widget_accelerator_handling_delegate.h",
     "widget/widget_aura_utils.cc",
     "widget/widget_aura_utils.h",
     "widget/widget_delegate.cc",
     "widget/widget_delegate.h",
     "widget/widget_deletion_observer.cc",
     "widget/widget_deletion_observer.h",
     "widget/widget_observer.h",
     "widget/widget_removals_observer.h",
     "window/client_view.cc",
     "window/client_view.h",
@@ skipping 653 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }