Enabled/disable touch screen in TabletPowerButtonController

chrome/browser/chromeos/system/input_device_settings.h

Index: chrome/browser/chromeos/system/input_device_settings.h
diff --git a/chrome/browser/chromeos/system/input_device_settings.h b/chrome/browser/chromeos/system/input_device_settings.h
index 5cf208f29a27b384e3d53e4eaf9dad212c6a6cdf..5d305af800d29a4903b2113040b4be7d97c7fc00 100644
--- a/chrome/browser/chromeos/system/input_device_settings.h
+++ b/chrome/browser/chromeos/system/input_device_settings.h
@@ -181,9 +181,13 @@ class CHROMEOS_EXPORT InputDeviceSettings {
   // user's preferences.
   void UpdateTouchDevicesStatusFromActiveProfilePrefs();
 
-  // Toggles the status of Touchscreen/Touchpad on or off and updates the local
-  // prefs.
-  void ToggleTouchscreen();
+  // Returns true if touchscreen is on, otherwise false.
+  bool IsTouchscreenEnabled() const;
+
+  // Sets the status of touchscreen to |enabled| and updates the local prefs.
+  void SetTouchscreenEnabled(bool enabled);
+
+  // Toggles the status of Touchpad on or off and updates the local prefs.

[Daniel Erat, 2016/11/30 22:58:07]

nit: s/Touchpad/touchpad/

[Qiang(Joe) Xu, 2016/12/02 17:42:52]

Done.

   void ToggleTouchpad();
 
   // Calls |callback|, possibly asynchronously, after determining if a touchpad