Hook up TABLET_MODE switch to maximize_mode_controller

ash/wm/maximize_mode/maximize_mode_controller.h

Index: ash/wm/maximize_mode/maximize_mode_controller.h
diff --git a/ash/wm/maximize_mode/maximize_mode_controller.h b/ash/wm/maximize_mode/maximize_mode_controller.h
index 427860a487e88766ac269beb8a147386f51f694f..9e99b9803d383e16acb94a7766a11df9ce407688 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.h
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -93,6 +93,7 @@ class ASH_EXPORT MaximizeModeController :
 
   // PowerManagerClient::Observer:
   void LidEventReceived(bool open, const base::TimeTicks& time) override;
+  void TabletModeEventReceived(bool on, const base::TimeTicks& time) override;
   void SuspendImminent() override;
   void SuspendDone(const base::TimeDelta& sleep_duration) override;
 #endif  // OS_CHROMEOS
@@ -153,9 +154,6 @@ class ASH_EXPORT MaximizeModeController :
   // Whether we have ever seen accelerometer data.
   bool have_seen_accelerometer_data_;
 
-  // True when the hinge angle has been detected past 180 degrees.
-  bool lid_open_past_180_;
-
   // Tracks time spent in (and out of) touchview mode.
   base::Time touchview_usage_interval_start_time_;
   base::TimeDelta total_touchview_time_;
@@ -169,6 +167,11 @@ class ASH_EXPORT MaximizeModeController :
   // Source for the current time in base::TimeTicks.
   std::unique_ptr<base::TickClock> tick_clock_;
 
+#if defined(OS_CHROMEOS)
+  // Set when tablet mode switch is on. This is used to force maximize mode.
+  bool tablet_mode_switch_is_on_;
+#endif
+
   // Tracks when the lid is closed. Used to prevent entering maximize mode.
   bool lid_is_closed_;