Use centered app list position whenever virtual keyboard is allowed.

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 86e5acaa63d03122ef42bf6164c13f7eda46fd7d..a232560a425e960afa855da0a3a96573aa93315a 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.h
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -34,6 +34,11 @@ class ASH_EXPORT MaximizeModeController : public AccelerometerObserver {
     rotation_locked_ = rotation_locked;
   }
 
+  // True if it is possible to enter maximize mode in the current
+  // configuration. If this returns false, it should never be the case that
+  // maximize mode becomes enabled.
+  bool CanEnterMaximizeMode();
+
   // AccelerometerObserver:
   virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
                                       const gfx::Vector3dF& lid) OVERRIDE;
@@ -63,6 +68,9 @@ class ASH_EXPORT MaximizeModeController : public AccelerometerObserver {
   // When true calls to OnAccelerometerUpdated will not rotate the display.
   bool rotation_locked_;
 
+  // Whether we have ever seen accelerometer data.
+  bool have_seen_accelerometer_data_;
+
   DISALLOW_COPY_AND_ASSIGN(MaximizeModeController);
 };