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

chrome/browser/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 1202 matching lines @@
       "chromeos/policy/fake_consumer_management_service.cc",
       "chromeos/policy/fake_consumer_management_service.h",
       "chromeos/policy/fake_device_cloud_policy_initializer.cc",
       "chromeos/policy/fake_device_cloud_policy_initializer.h",
       "chromeos/policy/fake_device_cloud_policy_manager.cc",
       "chromeos/policy/fake_device_cloud_policy_manager.h",
       "chromeos/policy/stub_enterprise_install_attributes.cc",
       "chromeos/policy/stub_enterprise_install_attributes.h",
       "chromeos/settings/device_settings_test_helper.cc",
       "chromeos/settings/device_settings_test_helper.h",
-      "chromeos/system/fake_input_device_settings.cc",
-      "chromeos/system/fake_input_device_settings.h",
     ]
     configs += [ "//build/config/linux/dbus" ]
     deps += [ "//chromeos:test_support" ]
+    if (is_official_build || !is_debug) {
+      sources += [
+        "chromeos/system/fake_input_device_settings.cc",
+        "chromeos/system/fake_input_device_settings.h",
+      ]
+    }
   }
 
   if (enable_configuration_policy) {
     sources += [
       "policy/test/local_policy_test_server.cc",
       "policy/test/local_policy_test_server.h",
     ]
     public_deps += [
       "//components/policy:policy_component_test_support",
       "//components/policy:test_support",
@@ skipping 94 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }