Revert of Move content/browser/power_save_blocker to //device/power_save_blocker

device/power_save_blocker/power_save_blocker.gyp

-# Copyright 2016 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.
-
-{
-  'variables': {
-    'chromium_code': 1,
-  },
-  'targets': [
-    {
-      # GN version: //device/power_save_blocker
-      'target_name': 'device_power_save_blocker',
-      'type': '<(component)',
-      'dependencies': [
-        '../../base/base.gyp:base',
-      ],
-      'defines': [
-        'DEVICE_POWER_SAVE_BLOCKER_IMPLEMENTATION',
-      ],
-      'sources': [
-        # Note: file list duplicated in GN build, other than Android, as gyp
-        # for Android isn't supported.
-        'power_save_blocker.h',
-        'power_save_blocker_chromeos.cc',
-        'power_save_blocker_impl.cc',
-        'power_save_blocker_impl.h',
-        'power_save_blocker_mac.cc',
-        'power_save_blocker_ozone.cc',
-        'power_save_blocker_win.cc',
-        'power_save_blocker_x11.cc',
-      ],
-      'conditions': [
-        ['chromeos==1', {
-          'sources!': [
-            'power_save_blocker_ozone.cc',
-            'power_save_blocker_x11.cc',
-          ],
-          'dependencies': [
-            '../../chromeos/chromeos.gyp:chromeos',
-            '../../chromeos/chromeos.gyp:power_manager_proto',
-          ],
-        }],
-      ],
-    },
-  ],
-}