Migrate *-ime-thread switches to feature API

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/mime_util/mime_util.gyp:mime_util',
@@ skipping 1608 matching lines @@
       'zygote/zygote_main_linux.cc',
     ],
     'android_browser_sources': [
       'browser/accessibility/accessibility_tree_formatter_android.cc',
       'browser/accessibility/browser_accessibility_android.cc',
       'browser/accessibility/browser_accessibility_android.h',
       'browser/accessibility/browser_accessibility_manager_android.cc',
       'browser/accessibility/browser_accessibility_manager_android.h',
       'browser/android/composited_touch_handle_drawable.cc',
       'browser/android/composited_touch_handle_drawable.h',
+      'browser/android/content_feature_list.cc',
+      'browser/android/content_feature_list.h',
       'browser/android/content_view_core_impl.cc',
       'browser/android/content_view_core_impl.h',
       'browser/android/content_view_core_impl_observer.h',
       'browser/android/content_view_render_view.cc',
       'browser/android/content_view_render_view.h',
       'browser/android/content_view_statics.cc',
       'browser/android/content_view_statics.h',
       'browser/android/date_time_chooser_android.cc',
       'browser/android/date_time_chooser_android.h',
       'browser/android/deferred_download_observer.cc',
@@ skipping 553 matching lines @@
     ['enable_webvr==1 and OS=="android"', {
       'sources': [
         'browser/vr/android/cardboard/cardboard_vr_device.cc',
         'browser/vr/android/cardboard/cardboard_vr_device.h',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.cc',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.h',
       ],
     }],
   ],
 }