Reenable triggering of screen rotations by sensors.

chrome/browser/ui/touch/sensors/screen_orientation_listener.h

Index: chrome/browser/ui/touch/sensors/screen_orientation_listener.h
diff --git a/chrome/browser/ui/touch/sensors/screen_orientation_listener.h b/chrome/browser/ui/touch/sensors/screen_orientation_listener.h
new file mode 100644
index 0000000000000000000000000000000000000000..cd68cfdebbcb453d88e21c76023ac8ad1a4ec0fe
--- /dev/null
+++ b/chrome/browser/ui/touch/sensors/screen_orientation_listener.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2011 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 CHROME_BROWSER_UI_TOUCH_SENSORS_SCREEN_ORIENTATION_LISTENER_H_
+#define CHROME_BROWSER_UI_TOUCH_SENSORS_SCREEN_ORIENTATION_LISTENER_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/memory/singleton.h"
+#include "content/common/sensors_listener.h"
+
+// A singleton object to manage screen orientation.
+class ScreenOrientationListener : public sensors::Listener {
+ public:
+  // Returns the singleton object.
+  static ScreenOrientationListener* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<ScreenOrientationListener>;
+
+  ScreenOrientationListener();
+  virtual ~ScreenOrientationListener();
+
+  // sensors::Listener implementation
+  virtual void OnScreenOrientationChanged(
+      const sensors::ScreenOrientation& change) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenOrientationListener);
+};
+
+#endif  // CHROME_BROWSER_UI_TOUCH_SENSORS_SCREEN_ORIENTATION_LISTENER_H_