Enable maximize mode when keyboard is open past 180 degrees.

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
new file mode 100644
index 0000000000000000000000000000000000000000..f9919fa08d2af4a89446f0bf63600ad459d666b4
--- /dev/null
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -0,0 +1,29 @@
+// 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_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_
+#define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_
+
+#include "ash/accelerometer/accelerometer_observer.h"
+#include "base/macros.h"
+
+namespace ash {
+
+// MaximizeModeController listens to accelerometer events and automatically
+// enters and exits maximize mode when the lid is opened beyond the triggering
+// angle.
+class MaximizeModeController : public AccelerometerObserver {
+ public:
+  MaximizeModeController();
+  virtual ~MaximizeModeController();
+
+  virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
+                                      const gfx::Vector3dF& lid) OVERRIDE;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MaximizeModeController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_