Remove all gyp[i] files in //chrome

chrome/chrome_features.gyp

-# Copyright 2015 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.
-
-{
-  'includes': [
-    'chrome_features.gypi',
-  ],
-  'targets': [
-    {
-      # GN version: //chrome/common:features
-      'target_name': 'chrome_common_features',
-      'includes': [ '../build/buildflag_header.gypi' ],
-      'variables': {
-        'buildflag_header_path': 'chrome/common/features.h',
-        'buildflag_flags': [
-          'ENABLE_BACKGROUND=<(enable_background)',
-          'ENABLE_GOOGLE_NOW=<(enable_google_now)',
-          'ENABLE_ONE_CLICK_SIGNIN=<(enable_one_click_signin)',
-          'ANDROID_JAVA_UI=<(android_java_ui)',
-          'USE_VULCANIZE=<(use_vulcanize)',
-          'ENABLE_PACKAGE_MASH_SERVICES=<(enable_package_mash_services)',
-        ],
-      },
-    },
-  ]
-}