chromeos/dbus: Update Bluetooth GATT API clients to upstream definition

chromeos/dbus/bluetooth_gatt_descriptor_client.h

 // 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 CHROMEOS_DBUS_BLUETOOTH_GATT_DESCRIPTOR_CLIENT_H_
 #define CHROMEOS_DBUS_BLUETOOTH_GATT_DESCRIPTOR_CLIENT_H_
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client.h"
 #include "dbus/object_path.h"
 #include "dbus/property.h"
 
 namespace chromeos {
 
 // BluetoothGattDescriptorClient is used to communicate with remote GATT
 // characteristic descriptor objects exposed by the Bluetooth daemon.
 class CHROMEOS_EXPORT BluetoothGattDescriptorClient : public DBusClient {
  public:
   // Structure of properties associated with GATT descriptors.
   struct Properties : public dbus::PropertySet {
     // The 128-bit characteristic descriptor UUID. [read-only]
     dbus::Property<std::string> uuid;
 
     // Object path of the GATT characteristic the descriptor belongs to.
     // [read-only]
     dbus::Property<dbus::ObjectPath> characteristic;
 
+    // The cached value of the descriptor. This property gets updated only after
+    // a successful read request. [read-only]
+    dbus::Property<std::vector<uint8_t>> value;
+
     Properties(dbus::ObjectProxy* object_proxy,
                const std::string& interface_name,
                const PropertyChangedCallback& callback);
     ~Properties() override;
   };
 
   // Interface for observing changes from a remote GATT characteristic
   // descriptor.
   class Observer {
    public:
@@ skipping 59 matching lines @@
  protected:
   BluetoothGattDescriptorClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothGattDescriptorClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_BLUETOOTH_GATT_DESCRIPTOR_CLIENT_H_