Auto rotate on lid rotation changes.

ash/accelerometer/accelerometer_observer.h

Index: ash/accelerometer/accelerometer_observer.h
diff --git a/ash/accelerometer/accelerometer_observer.h b/ash/accelerometer/accelerometer_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..f6cada5d2a5735ef7ae115547da9804c38b21d86
--- /dev/null
+++ b/ash/accelerometer/accelerometer_observer.h
@@ -0,0 +1,23 @@
+// 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.
+
+#ifndef ASH_ACCELEROMETER_ACCELEROMETER_OBSERVER_H_
+#define ASH_ACCELEROMETER_ACCELEROMETER_OBSERVER_H_
+
+namespace gfx {
+class Vector3dF;
+}
+
+namespace ash {
+
+// The interface for classes which observe accelerometer updates.
+class AccelerometerObserver {
+ public:

[oshima, 2014/04/01 00:57:03]

virtual dtor

[flackr, 2014/04/01 01:46:31]

Done in original CL.

+  virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
+                                      const gfx::Vector3dF& lid) = 0;
+};
+
+}  // namespace ash
+
+#endif  // ASH_ACCELEROMETER_ACCELEROMETER_OBSERVER_H_