Remove more dead app list code.

chrome/browser/ui/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/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 3186 matching lines @@
     deps += [ "//device/udev_linux" ]
   }
 
   if (enable_app_list) {
     sources += [
       "app_list/app_context_menu.cc",
       "app_list/app_context_menu.h",
       "app_list/app_context_menu_delegate.h",
       "app_list/app_list_controller_delegate.cc",
       "app_list/app_list_controller_delegate.h",
-      "app_list/app_list_controller_delegate_impl.cc",
-      "app_list/app_list_controller_delegate_impl.h",
       "app_list/app_list_model_builder.cc",
       "app_list/app_list_model_builder.h",
       "app_list/app_list_service.cc",
       "app_list/app_list_service.h",
       "app_list/app_list_service_impl.cc",
       "app_list/app_list_service_impl.h",
       "app_list/app_list_syncable_service.cc",
       "app_list/app_list_syncable_service.h",
       "app_list/app_list_syncable_service_factory.cc",
       "app_list/app_list_syncable_service_factory.h",
@@ skipping 333 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }