Revert of bluetooth: Use WebBluetoothDeviceId instead of string

content/browser/bluetooth/frame_connected_bluetooth_devices.h

Index: content/browser/bluetooth/frame_connected_bluetooth_devices.h
diff --git a/content/browser/bluetooth/frame_connected_bluetooth_devices.h b/content/browser/bluetooth/frame_connected_bluetooth_devices.h
index 4168059d2f92b9a008f3fc0877e815d20a3b9c72..bf76e55763527d7cfcfbeaf7f0c6957cbf80c2e6 100644
--- a/content/browser/bluetooth/frame_connected_bluetooth_devices.h
+++ b/content/browser/bluetooth/frame_connected_bluetooth_devices.h
@@ -9,8 +9,6 @@
 #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"
 
@@ -37,22 +35,22 @@
   ~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:
@@ -66,14 +64,12 @@
 
   // 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);
 };