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;
 
 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 113 matching lines @@
   void SetTapToClick(bool enabled) override;
   void SetThreeFingerClick(bool enabled) override;
   void SetTapDragging(bool enabled) override;
   void SetNaturalScroll(bool enabled) override;
   void MouseExists(const DeviceExistsCallback& callback) override;
   void UpdateMouseSettings(const MouseSettings& settings) override;
   void SetMouseSensitivity(int value) override;
   void SetPrimaryButtonRight(bool right) override;
   void ReapplyTouchpadSettings() override;
   void ReapplyMouseSettings() override;
+  InputDeviceSettings::FakeInterface* GetFakeInterface() override;
   void SetInternalTouchpadEnabled(bool enabled) override;
   void SetTouchscreensEnabled(bool enabled) override;
 
   // Generate arguments for the inputcontrol script.
   //
   // |argv| is filled with arguments of script, that should be launched in order
   // to apply update.
   void GenerateTouchpadArguments(std::vector<std::string>* argv);
   void GenerateMouseArguments(std::vector<std::string>* argv);
 
@@ skipping 106 matching lines @@
       if (enabled)
         device_data_manager->EnableDevice(xi_dev_list[i].deviceid);
       else
         device_data_manager->DisableDevice(xi_dev_list[i].deviceid);
 
       return;
     }
   }
 }
 
+InputDeviceSettings::FakeInterface*
+InputDeviceSettingsImplX11::GetFakeInterface() {
+  return nullptr;
+}
+
 void InputDeviceSettingsImplX11::SetTouchscreensEnabled(bool enabled) {
   ui::TouchFactory::GetInstance()->SetTouchscreensEnabled(enabled);
 }
 
 void InputDeviceSettingsImplX11::GenerateTouchpadArguments(
     std::vector<std::string>* argv) {
   argv->push_back(kInputControl);
   if (current_touchpad_settings_.IsSensitivitySet()) {
     AddSensitivityArguments(kDeviceTypeTouchpad,
                             current_touchpad_settings_.GetSensitivity(), argv);
@@ skipping 27 matching lines @@
   if (current_mouse_settings_.IsPrimaryButtonRightSet()) {
     AddTPControlArguments(
         "mouse_swap_lr", current_mouse_settings_.GetPrimaryButtonRight(), argv);
   }
 }
 
 }  // namespace
 
 // static
 InputDeviceSettings* InputDeviceSettings::Get() {
-  if (g_test_instance)
-    return g_test_instance;
-  if (!g_instance)
-    g_instance = new InputDeviceSettingsImplX11;
+  if (!g_instance) {
+    if (base::SysInfo::IsRunningOnChromeOS())
+      g_instance = new InputDeviceSettingsImplX11;
+    else
+      g_instance = new FakeInputDeviceSettings;
+  }
   return g_instance;
 }
 
-// static
-void InputDeviceSettings::SetSettingsForTesting(
-    InputDeviceSettings* test_settings) {
-  if (g_test_instance == test_settings)
-    return;
-  delete g_test_instance;
-  g_test_instance = test_settings;
-}
-
 }  // namespace system
 }  // namespace chromeos