Revert of Use chromeos accelerometer reader and support only lid accelerometer.

athena/system/device_socket_listener.h

Index: athena/system/device_socket_listener.h
diff --git a/athena/system/device_socket_listener.h b/athena/system/device_socket_listener.h
new file mode 100644
index 0000000000000000000000000000000000000000..6bdb649e2c6767f8f4f24a6f98ffbc9ab684872d
--- /dev/null
+++ b/athena/system/device_socket_listener.h
@@ -0,0 +1,48 @@
+// 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 ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_
+#define ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+
+namespace base {
+class TaskRunner;
+}
+
+namespace athena {
+
+// This class reads device-data from a socket.
+class DeviceSocketListener {
+ public:
+  DeviceSocketListener(const std::string& socket_parth,
+                       size_t data_size);
+  virtual ~DeviceSocketListener();
+
+  static void CreateSocketManager(
+      scoped_refptr<base::TaskRunner> io_task_runner);
+  static void ShutdownSocketManager();
+
+  // This is called on the FILE thread when data is available on the socket.
+  // |data| is guaranteed to be of exactly |data_size| length. Note that the
+  // implementation must not mutate or free the data.
+  virtual void OnDataAvailableOnFILE(const void* data) = 0;
+
+ protected:
+  void StartListening();
+  void StopListening();
+
+ private:
+  const std::string socket_path_;
+  size_t data_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceSocketListener);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_SYSTEM_DEVICE_SOCKET_LISTENER_H_