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

chrome/browser/chromeos/system/input_device_settings_impl_x11.cc

 // 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.
 
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/kill.h"
 #include "base/process/launch.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "base/task_runner.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/chromeos/system/fake_input_device_settings.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/events/devices/x11/device_data_manager_x11.h"
 #include "ui/events/devices/x11/device_list_cache_x11.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
 #include "ui/gfx/x/x11_types.h"
 
 namespace chromeos {
 namespace system {
 
 namespace {
 
 InputDeviceSettings* g_instance = nullptr;
-InputDeviceSettings* g_test_instance = nullptr;
+FakeInputDeviceSettings* g_test_instance = nullptr;
 
 const char kDeviceTypeTouchpad[] = "touchpad";
 const char kDeviceTypeMouse[] = "mouse";
 const char kInputControl[] = "/opt/google/input/inputcontrol";
 
 // The name of the xinput device corresponding to the internal touchpad.
 const char kInternalTouchpadName[] = "Elan Touchpad";
 
 typedef base::RefCountedData<bool> RefCountedBool;
 
@@ skipping 294 matching lines @@
 // static
 InputDeviceSettings* InputDeviceSettings::Get() {
   if (g_test_instance)
     return g_test_instance;
   if (!g_instance)
     g_instance = new InputDeviceSettingsImplX11;
   return g_instance;
 }
 
 // static
+FakeInputDeviceSettings* InputDeviceSettings::GetForTesting() {
+  if (!g_test_instance)
+    g_test_instance = new FakeInputDeviceSettings();
+  return g_test_instance;
+}
+
+// static
 void InputDeviceSettings::SetSettingsForTesting(
-    InputDeviceSettings* test_settings) {
+    FakeInputDeviceSettings* test_settings) {
   if (g_test_instance == test_settings)
     return;
   delete g_test_instance;
   g_test_instance = test_settings;
 }
 
 }  // namespace system
 }  // namespace chromeos