Add implementation for parsing device info in read/write attribute calls.

device/bluetooth/dbus/bluetooth_gatt_descriptor_service_provider_impl.h

 // Copyright 2016 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_GATT_DESCRIPTOR_SERVICE_PROVIDER_IMPL_H_
 #define DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_DESCRIPTOR_SERVICE_PROVIDER_IMPL_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 40 matching lines @@
   // Called by dbus:: when the Bluetooth daemon sets a single property of the
   // descriptor.
   void Set(dbus::MethodCall* method_call,
            dbus::ExportedObject::ResponseSender response_sender);
 
   // Called by dbus:: when the Bluetooth daemon fetches all properties of the
   // descriptor.
   void GetAll(dbus::MethodCall* method_call,
               dbus::ExportedObject::ResponseSender response_sender);
 
+  // Called by BlueZ when a remote central is requesting to read the value of
+  // this descriptor.
+  void ReadValue(dbus::MethodCall* method_call,
+                 dbus::ExportedObject::ResponseSender response_sender);
+
+  // Called by BlueZ when a remote central is requesting to write the value of
+  // this descriptor.
+  void WriteValue(dbus::MethodCall* method_call,
+                  dbus::ExportedObject::ResponseSender response_sender);
+
   // Called by dbus:: when a method is exported.
   void OnExported(const std::string& interface_name,
                   const std::string& method_name,
                   bool success);
 
-  // Writes the characteristics's properties into the provided writer. If
-  // value is not null, it is written also, otherwise no value property is
-  // written.
+  // Writes the descriptor's properties into the provided writer.
   void WriteProperties(dbus::MessageWriter* writer) override;
 
+  // Called by the Delegate in response to a method to call to read the value
+  // of this descriptor.
+  void OnReadValue(dbus::MethodCall* method_call,
+                   dbus::ExportedObject::ResponseSender response_sender,
+                   const std::vector<uint8_t>& value);
+
+  // Called by the Delegate in response to a method to call to write the value
+  // of this descriptor.
+  void OnWriteValue(dbus::MethodCall* method_call,
+                    dbus::ExportedObject::ResponseSender response_sender);
+
   // Called by the Delegate in response to a failed method call to get or set
   // the descriptor value.
   void OnFailure(dbus::MethodCall* method_call,
                  dbus::ExportedObject::ResponseSender response_sender);
 
   const dbus::ObjectPath& object_path() const override;
 
   // Origin thread (i.e. the UI thread in production).
   base::PlatformThreadId origin_thread_id_;
 
@@ skipping 29 matching lines @@
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothGattDescriptorServiceProviderImpl>
       weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothGattDescriptorServiceProviderImpl);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_DESCRIPTOR_SERVICE_PROVIDER_IMPL_H_