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diff --git a/device/bluetooth/dbus/bluetooth_input_client.h b/device/bluetooth/dbus/bluetooth_input_client.h
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+++ b/device/bluetooth/dbus/bluetooth_input_client.h
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+// Copyright 2013 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 DEVICE_BLUETOOTH_DBUS_BLUETOOTH_INPUT_CLIENT_H_
+#define DEVICE_BLUETOOTH_DBUS_BLUETOOTH_INPUT_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/observer_list.h"
+#include "dbus/object_path.h"
+#include "dbus/property.h"
+#include "device/bluetooth/bluetooth_export.h"
+#include "device/bluetooth/dbus/bluez_dbus_client.h"
+
+namespace bluez {
+
+// BluetoothInputClient is used to communicate with objects representing
+// Bluetooth Input (HID) devices.
+class DEVICE_BLUETOOTH_EXPORT BluetoothInputClient : public BluezDBusClient {
+ public:
+  // Structure of properties associated with bluetooth input devices.
+  struct Properties : public dbus::PropertySet {
+    // The Bluetooth input device reconnect mode. Read-only.
+    dbus::Property<std::string> reconnect_mode;
+
+    Properties(dbus::ObjectProxy* object_proxy,
+               const std::string& interface_name,
+               const PropertyChangedCallback& callback);
+    ~Properties() override;
+  };
+
+  // Interface for observing changes from a remote bluetooth input device.
+  class Observer {
+   public:
+    virtual ~Observer() {}
+
+    // Called when the remote device with object path |object_path| implementing
+    // the Input interface is added to the set of known devices or an already
+    // known device implements the Input interface.
+    virtual void InputAdded(const dbus::ObjectPath& object_path) {}
+
+    // Called when the remote device with object path |object_path| is removed
+    // from the set of known devices or does not implement the Input interface
+    // anymore.
+    virtual void InputRemoved(const dbus::ObjectPath& object_path) {}
+
+    // Called when the device with object path |object_path| has a
+    // change in value of the property named |property_name| of its Input
+    // interface.
+    virtual void InputPropertyChanged(const dbus::ObjectPath& object_path,
+                                      const std::string& property_name) {}
+  };
+
+  ~BluetoothInputClient() override;
+
+  // Adds and removes observers for events on all remote bluetooth input
+  // devices. Check the |object_path| parameter of observer methods to
+  // determine which device is issuing the event.
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Obtain the properties for the device with object path |object_path|,
+  // any values should be copied if needed.
+  virtual Properties* GetProperties(const dbus::ObjectPath& object_path) = 0;
+
+  // Creates the instance.
+  static BluetoothInputClient* Create();
+
+ protected:
+  BluetoothInputClient();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BluetoothInputClient);
+};
+
+}  // namespace bluez
+
+#endif  // DEVICE_BLUETOOTH_DBUS_BLUETOOTH_INPUT_CLIENT_H_