Revert of bluetooth: Use WebBluetoothDeviceId instead of string

content/browser/bluetooth/frame_connected_bluetooth_devices.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 CONTENT_BROWSER_BLUETOOTH_FRAME_CONNECTED_BLUETOOTH_DEVICES_H_
 #define CONTENT_BROWSER_BLUETOOTH_FRAME_CONNECTED_BLUETOOTH_DEVICES_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
 
-#include "base/optional.h"
-#include "content/common/bluetooth/web_bluetooth_device_id.h"
 #include "content/common/content_export.h"
 #include "url/origin.h"
 
 namespace device {
 class BluetoothGattConnection;
 }  // namespace device
 
 namespace content {
 
 class RenderFrameHost;
 class WebContentsImpl;
 
 // Holds information about connected devices and updates the WebContents
 // when new connections are made or connections closed. WebContents must
 // outlive this class.
 // This class does not keep track of the status of the connections. Owners of
 // this class should inform it when a connection is terminated so that the
 // connection is removed from the appropriate maps.
 class CONTENT_EXPORT FrameConnectedBluetoothDevices final {
  public:
   // |rfh| should be the RenderFrameHost that owns the WebBluetoothServiceImpl
   // that owns this map.
   explicit FrameConnectedBluetoothDevices(RenderFrameHost* rfh);
   ~FrameConnectedBluetoothDevices();
 
   // Returns true if the map holds a connection to |device_id|.
-  bool IsConnectedToDeviceWithId(const WebBluetoothDeviceId& device_id);
+  bool IsConnectedToDeviceWithId(const std::string& device_id);
 
   // If a connection doesn't exist already for |device_id|, adds a connection to
   // the map and increases the WebContents count of connected devices.
-  void Insert(const WebBluetoothDeviceId& device_id,
+  void Insert(const std::string& device_id,
               std::unique_ptr<device::BluetoothGattConnection> connection);
 
   // Deletes the BluetoothGattConnection for |device_id| and decrements the
   // WebContents count of connected devices if |device_id| had a connection.
-  void CloseConnectionToDeviceWithId(const WebBluetoothDeviceId& device_id);
+  void CloseConnectionToDeviceWithId(const std::string& device_id);
 
   // Deletes the BluetoothGattConnection for |device_address| and decrements the
   // WebContents count of connected devices if |device_address| had a
   // connection. Returns the device_id of the device associated with the
   // connection.
-  base::Optional<WebBluetoothDeviceId> CloseConnectionToDeviceWithAddress(
+  std::string CloseConnectionToDeviceWithAddress(
       const std::string& device_address);
 
  private:
   // Increments the Connected Devices count of the frame's WebContents.
   void IncrementDevicesConnectedCount();
   // Decrements the Connected Devices count of the frame's WebContents.
   void DecrementDevicesConnectedCount();
 
   // WebContentsImpl that owns the WebBluetoothServiceImpl that owns this map.
   WebContentsImpl* web_contents_impl_;
 
   // Keeps the BluetoothGattConnection objects alive so that connections don't
   // get closed.
-  std::unordered_map<WebBluetoothDeviceId,
-                     std::unique_ptr<device::BluetoothGattConnection>,
-                     WebBluetoothDeviceIdHash>
+  std::unordered_map<std::string,
+                     std::unique_ptr<device::BluetoothGattConnection>>
       device_id_to_connection_map_;
 
   // Keeps track of which device addresses correspond to which ids.
-  std::unordered_map<std::string, WebBluetoothDeviceId>
-      device_address_to_id_map_;
+  std::unordered_map<std::string, std::string> device_address_to_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameConnectedBluetoothDevices);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BLUETOOTH_FRAME_CONNECTED_BLUETOOTH_DEVICES_H_