Hook up TABLET_MODE switch to maximize_mode_controller

chromeos/dbus/power_manager_client.h

Index: chromeos/dbus/power_manager_client.h
diff --git a/chromeos/dbus/power_manager_client.h b/chromeos/dbus/power_manager_client.h
index 59bed6a2cae3d7b656f94e330a5bb51caa959987..789c25a4beb26fb102f51bec8653ab3b705f7ef9 100644
--- a/chromeos/dbus/power_manager_client.h
+++ b/chromeos/dbus/power_manager_client.h
@@ -88,6 +88,10 @@ class CHROMEOS_EXPORT PowerManagerClient : public DBusClient {
     virtual void LidEventReceived(bool open,
                                   const base::TimeTicks& timestamp) {}
 
+    // Called when the device's tablet mode switch is on or off.
+    virtual void TabletModeEventReceived(bool on,
+                                         const base::TimeTicks& timestamp) {}
+
     // Called when the idle action will be performed after
     // |time_until_idle_action|.
     virtual void IdleActionImminent(