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

chrome/chrome_browser_chromeos.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.
 
 {
   'variables': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 1114 matching lines @@
         'browser/chromeos/extensions/wallpaper_api.cc',
         'browser/chromeos/extensions/wallpaper_api.h',
         'browser/chromeos/extensions/wallpaper_function_base.cc',
         'browser/chromeos/extensions/wallpaper_function_base.h',
         'browser/chromeos/extensions/wallpaper_manager_util.cc',
         'browser/chromeos/extensions/wallpaper_manager_util.h',
         'browser/chromeos/extensions/wallpaper_private_api.cc',
         'browser/chromeos/extensions/wallpaper_private_api.h',
         'browser/ui/webui/voice_search_ui.cc',
         'browser/ui/webui/voice_search_ui.h',
+
+    ],
+    # Sources that should not be included in the official build.
+    'browser_chromeos_non_official_sources': [
+        'browser/chromeos/system/fake_input_device_settings.cc',
+        'browser/chromeos/system/fake_input_device_settings.h',
     ],
   },
   'targets': [
     {
       # GN version: //chrome/browser/chromeos
       'target_name': 'browser_chromeos',
       'type': 'static_library',
       'variables': {
         # Override to dynamically link the cras (ChromeOS audio) library.
         'use_cras%': 0,
@@ skipping 177 matching lines @@
             '../printing/printing.gyp:printing',
           ],
         }],
         ['use_ozone == 1', {
           'dependencies': [
             '../ui/ozone/ozone.gyp:ozone',
             '../ui/ozone/ozone.gyp:ozone_base',
           ],
         }],
       ],
+      'configurations': {
+        'Debug': {
+          'conditions': [
+            ['buildtype!="Official"', {

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

Do we even support official Debug builds?

+              'sources': [ '<@(browser_chromeos_non_official_sources)' ],
+            }],
+          ],
+        },
+      },
     },
     {
       # GN version: //chrome/browser/chromeos:device_policy_proto
       # Protobuf compiler / generator for device settings protocol buffers.
       'target_name': 'device_policy_proto',
       'type': 'static_library',
       'sources': [
         'browser/chromeos/policy/proto/chrome_device_policy.proto',
         'browser/chromeos/policy/proto/install_attributes.proto',
       ],
@@ skipping 13 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }