Use fake Input Device Settings with chrome://device-emulator

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'variables': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 2946 matching lines @@
           ],
         }],
         ['safe_browsing==1', {
           'dependencies': [
             'safe_browsing_chunk_proto',
             'safe_browsing_proto',
           ],
         }],
         ['buildtype!="Official" and chromeos==1', {
           'sources': [ '<@(chrome_browser_ui_chromeos_non_official_sources)' ],
+          'dependencies': [
+            'browser_chromeos',
+          ],

[stevenjb, 2016/05/24 20:57:25]

Isn't this redundant with line 2974?

         }],
         ['chromeos==1', {
           'sources': [ '<@(chrome_browser_ui_chromeos_sources)' ],
           'dependencies': [
             'browser_chromeos',
             '../components/components.gyp:proximity_auth_webui',
             '../device/nfc/nfc.gyp:device_nfc',
             '../ui/base/ime/ui_base_ime.gyp:ui_base_ime',
             '../ui/chromeos/ui_chromeos.gyp:ui_chromeos',
             '../ui/chromeos/ui_chromeos.gyp:ui_chromeos_resources',
@@ skipping 346 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }