Revert of Tablet-like power button behavior on Convertible/Tablet ChromeOS devices

ash/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")
 
 assert(use_aura)
@@ skipping 716 matching lines @@
     "shell.cc",
     "shell.h",
     "shell_init_params.h",
     "sticky_keys/sticky_keys_controller.cc",
     "sticky_keys/sticky_keys_controller.h",
     "sticky_keys/sticky_keys_overlay.cc",
     "sticky_keys/sticky_keys_overlay.h",
     "sticky_keys/sticky_keys_state.h",
     "system/chromeos/power/power_event_observer.cc",
     "system/chromeos/power/power_event_observer.h",
-    "system/chromeos/power/tablet_power_button_controller.cc",
-    "system/chromeos/power/tablet_power_button_controller.h",
     "system/chromeos/power/video_activity_notifier.cc",
     "system/chromeos/power/video_activity_notifier.h",
     "system/chromeos/rotation/tray_rotation_lock.cc",
     "system/chromeos/rotation/tray_rotation_lock.h",
     "system/chromeos/screen_layout_observer.cc",
     "system/chromeos/screen_layout_observer.h",
     "touch/touch_hud_debug.cc",
     "touch/touch_hud_debug.h",
     "touch/touch_hud_projection.cc",
     "touch/touch_hud_projection.h",
@@ skipping 534 matching lines @@
     "rotator/screen_rotation_animation_unittest.cc",
     "screen_util_unittest.cc",
     "shelf/shelf_layout_manager_unittest.cc",
     "shelf/shelf_unittest.cc",
     "shelf/shelf_view_unittest.cc",
     "shelf/shelf_widget_unittest.cc",
     "shell_unittest.cc",
     "sticky_keys/sticky_keys_overlay_unittest.cc",
     "sticky_keys/sticky_keys_unittest.cc",
     "system/chromeos/power/power_event_observer_unittest.cc",
-    "system/chromeos/power/tablet_power_button_controller_unittest.cc",
     "system/chromeos/power/video_activity_notifier_unittest.cc",
     "system/chromeos/rotation/tray_rotation_lock_unittest.cc",
     "system/chromeos/screen_layout_observer_unittest.cc",
     "system/overview/overview_button_tray_unittest.cc",
     "system/toast/toast_manager_unittest.cc",
     "system/web_notification/ash_popup_alignment_delegate_unittest.cc",
     "system/web_notification/web_notification_tray_unittest.cc",
     "test/ash_test_environment_default.cc",
     "test/ash_test_helper_unittest.cc",
     "test/ash_unittests.cc",
@@ skipping 189 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }