Refactor BluetoothAllowedDevicesMap

content/browser/bluetooth/bluetooth_allowed_devices.h

 // Copyright 2015 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 CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_MAP_H_
-#define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_MAP_H_
+#ifndef CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_H_
+#define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
 
 #include "base/optional.h"
 #include "content/common/bluetooth/web_bluetooth_device_id.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom.h"
-#include "url/origin.h"
 
 namespace device {
 class BluetoothUUID;
 }
 
 namespace content {
 
-// Keeps track of which origins are allowed to access which devices and
-// their services.
+// Tracks the devices and their services that a site has been granted
+// access to.
 //
 // |AddDevice| generates device ids, which are random strings that are unique
 // in the map.
-class CONTENT_EXPORT BluetoothAllowedDevicesMap final {
+class CONTENT_EXPORT BluetoothAllowedDevices final {
  public:
-  BluetoothAllowedDevicesMap();
-  ~BluetoothAllowedDevicesMap();
+  BluetoothAllowedDevices();
+  BluetoothAllowedDevices(const BluetoothAllowedDevices& other);
+  ~BluetoothAllowedDevices();
 
   // Adds the Bluetooth Device with |device_address| to the map of allowed
-  // devices for that origin. Generates and returns a device id. Because
-  // unique origins generate the same hash, unique origins are not supported.
-  // Calling this function with a unique origin will CHECK-fail.
+  // devices. Generates and returns a new random device ID so that devices
+  // IDs can not be compared between sites.
   const WebBluetoothDeviceId& AddDevice(
-      const url::Origin& origin,
       const std::string& device_address,
       const blink::mojom::WebBluetoothRequestDeviceOptionsPtr& options);
 
   // Removes the Bluetooth Device with |device_address| from the map of allowed
-  // devices for |origin|.
-  void RemoveDevice(const url::Origin& origin,
-                    const std::string& device_address);
+  // devices.
+  void RemoveDevice(const std::string& device_address);
 
-  // Returns the Bluetooth Device's id for |origin| if |origin| is allowed to
-  // access the device.
-  const WebBluetoothDeviceId* GetDeviceId(const url::Origin& origin,
-                                          const std::string& device_address);
+  // Returns the Bluetooth Device's id if it has been added previously with
+  // |AddDevice|.
+  const WebBluetoothDeviceId* GetDeviceId(const std::string& device_address);
 
-  // For |device_id| in |origin|, returns the Bluetooth device's address. If
-  // there is no such |device_id| in |origin|, returns an empty string.
-  const std::string& GetDeviceAddress(const url::Origin& origin,
-                                      const WebBluetoothDeviceId& device_id);
+  // For |device_id|, returns the Bluetooth device's address. If there is no
+  // such |device_id|, returns an empty string.
+  const std::string& GetDeviceAddress(const WebBluetoothDeviceId& device_id);
 
-  // Returns true if the origin has previously been granted access to at least
-  // one service.
-  bool IsOriginAllowedToAccessAtLeastOneService(
-      const url::Origin& origin,
+  // Returns true if access has previously been granted to at least one
+  // service.
+  bool IsAllowedToAccessAtLeastOneService(
       const WebBluetoothDeviceId& device_id) const;
 
-  // Returns true if the origin has previously been granted access to
-  // the service.
-  bool IsOriginAllowedToAccessService(
-      const url::Origin& origin,
+  // Returns true if access has previously been granted to the service.
+  bool IsAllowedToAccessService(
       const WebBluetoothDeviceId& device_id,
       const device::BluetoothUUID& service_uuid) const;
 
  private:
   typedef std::unordered_map<std::string, WebBluetoothDeviceId>
       DeviceAddressToIdMap;
-  typedef std::unordered_map<WebBluetoothDeviceId,
-                             std::string,
-                             WebBluetoothDeviceIdHash>
-      DeviceIdToAddressMap;
+  typedef std::
+      unordered_map<WebBluetoothDeviceId, std::string, WebBluetoothDeviceIdHash>
+          DeviceIdToAddressMap;
   typedef std::unordered_map<
       WebBluetoothDeviceId,
       std::unordered_set<device::BluetoothUUID, device::BluetoothUUIDHash>,
       WebBluetoothDeviceIdHash>
       DeviceIdToServicesMap;
 
   // Returns an id guaranteed to be unique for the map. The id is randomly
   // generated so that an origin can't guess the id used in another origin.
   WebBluetoothDeviceId GenerateUniqueDeviceId();
   void AddUnionOfServicesTo(
       const blink::mojom::WebBluetoothRequestDeviceOptionsPtr& options,
       std::unordered_set<device::BluetoothUUID, device::BluetoothUUIDHash>*
           unionOfServices);
 
-  // TODO(ortuno): Now that there is only one instance of this class per frame
-  // and that this map gets destroyed when navigating consider removing the
-  // origin mapping.
-  // http://crbug.com/610343
-  std::map<url::Origin, DeviceAddressToIdMap>
-      origin_to_device_address_to_id_map_;
-  std::map<url::Origin, DeviceIdToAddressMap>
-      origin_to_device_id_to_address_map_;
-  std::map<url::Origin, DeviceIdToServicesMap>
-      origin_to_device_id_to_services_map_;
+  DeviceAddressToIdMap device_address_to_id_map_;
+  DeviceIdToAddressMap device_id_to_address_map_;
+  DeviceIdToServicesMap device_id_to_services_map_;
 
   // Keep track of all device_ids in the map.
   std::unordered_set<WebBluetoothDeviceId, WebBluetoothDeviceIdHash>
       device_id_set_;
 };
 
 }  //  namespace content
 
-#endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_MAP_H_
+#endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ALLOWED_DEVICES_H_