chromeos: Remove unused NFC D-Bus client library

chromeos/dbus/nfc_tag_client.h

-// 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 CHROMEOS_DBUS_NFC_TAG_CLIENT_H_
-#define CHROMEOS_DBUS_NFC_TAG_CLIENT_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/values.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/dbus/dbus_client.h"
-#include "chromeos/dbus/nfc_client_helpers.h"
-#include "chromeos/dbus/nfc_property_set.h"
-#include "chromeos/dbus/nfc_record_client.h"
-#include "dbus/object_path.h"
-#include "dbus/object_proxy.h"
-#include "dbus/property.h"
-
-namespace chromeos {
-
-class NfcAdapterClient;
-
-// NfcTagClient is used to communicate with objects representing remote NFC
-// tags.
-class CHROMEOS_EXPORT NfcTagClient : public DBusClient {
- public:
-  // Structure of properties associated with an NFC tag.
-  struct Properties : public NfcPropertySet {
-    // The NFC tag type. Possible values are "Type 1", "Type 2", "Type 3",
-    // and "Type 4". Read-only.
-    dbus::Property<std::string> type;
-
-    // The NFC tag radio protocol. Possible values are "Felica", "MIFARE",
-    // "Jewel", "ISO-DEP", and "NFC-DEP". Read-only.
-    dbus::Property<std::string> protocol;
-
-    // List of object paths for NDEF Records associated with the NFC tag.
-    // Read-only.
-    dbus::Property<std::vector<dbus::ObjectPath> > records;
-
-    // The current status of the tag's read mode. Read-only.
-    dbus::Property<bool> read_only;
-
-    Properties(dbus::ObjectProxy* object_proxy,
-               const PropertyChangedCallback& callback);
-    ~Properties() override;
-  };
-
-  // Interface for observing changes from a remote NFC tag.
-  class Observer {
-   public:
-    virtual ~Observer() {}
-
-    // Called when a remote NFC tag with the object path |object_path| is added
-    // to the set of known tags.
-    virtual void TagAdded(const dbus::ObjectPath& object_path) {}
-
-    // Called when a remote NFC tag with the object path |object_path| is
-    // removed from the set of known tags.
-    virtual void TagRemoved(const dbus::ObjectPath& object_path) {}
-
-    // Called when the tag property with the name |property_name| on tag with
-    // object path |object_path| has acquired a new value.
-    virtual void TagPropertyChanged(const dbus::ObjectPath& object_path,
-                                    const std::string& property_name) {}
-
-    // Called when all properties for the tag with object path |object_path|
-    // have been received. This method will be called after
-    // Observer::TagPropertyChanged has been called for all properties that
-    // were received through the initial property fetch that is done when the
-    // object proxy is first created or after a call to
-    // dbus::PropertySet::GetAll. Observers can use this method to be notified
-    // when all existing properties of a tag are available for use.
-    virtual void TagPropertiesReceived(const dbus::ObjectPath& object_path) {}
-  };
-
-  ~NfcTagClient() override;
-
-  // Adds and removes observers for events on all remote NFC tags. Check the
-  // |object_path| parameter of observer methods to determine which tag is
-  // issuing the event.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
-
-  // Returns the list of tag object paths associated with the given adapter
-  // identified by the D-Bus object path |adapter_path|.
-  virtual std::vector<dbus::ObjectPath> GetTagsForAdapter(
-      const dbus::ObjectPath& adapter_path) = 0;
-
-  // Obtain the properties for the NFC tag with object path |object_path|; any
-  // values should be copied if needed.
-  virtual Properties* GetProperties(const dbus::ObjectPath& object_path) = 0;
-
-  // Creates an NDEF record for the NFC tag with object path |object_path|
-  // using the parameters in |attributes|. |attributes| is a dictionary,
-  // containing the NFC Record properties which will be assigned to the
-  // resulting record object and written to the tag. The properties are defined
-  // by the NFC Record interface (see namespace "nfc_record" in
-  // third_party/cros_system_api/dbus/service_constants.h and
-  // NfcRecordClient::Properties). |attributes| should at least contain a
-  // "Type" plus any other properties associated with that type. For example:
-  //
-  //    {
-  //      "Type": "Text",
-  //      "Encoding": "UTF-8",
-  //      "Language": "en",
-  //      "Representation": "Chrome OS rulez!"
-  //    },
-  //    {
-  //      "Type": "URI",
-  //      "URI": "http://www.chromium.org"
-  //    },
-  //    etc.
-  virtual void Write(
-      const dbus::ObjectPath& object_path,
-      const base::DictionaryValue& attributes,
-      const base::Closure& callback,
-      const nfc_client_helpers::ErrorCallback& error_callback) = 0;
-
-  // Creates the instance.
-  static NfcTagClient* Create(NfcAdapterClient* adapter_client);
-
- protected:
-  friend class NfcClientTest;
-
-  NfcTagClient();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(NfcTagClient);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DBUS_NFC_TAG_CLIENT_H_