bluetooth: Use BluetoothUUID instead of string when sending uuids

content/browser/bluetooth/bluetooth_metrics.h

Index: content/browser/bluetooth/bluetooth_metrics.h
diff --git a/content/browser/bluetooth/bluetooth_metrics.h b/content/browser/bluetooth/bluetooth_metrics.h
index d6307947956f8ffd21327dd65d5bf1c66d171f99..9579061a92d0739617ee484946d911121436a9f3 100644
--- a/content/browser/bluetooth/bluetooth_metrics.h
+++ b/content/browser/bluetooth/bluetooth_metrics.h
@@ -139,7 +139,8 @@ enum class UMAGetPrimaryServiceOutcome {
   COUNT
 };
 // Record the service uuid used when calling getPrimaryService.
-void RecordGetPrimaryServiceService(const device::BluetoothUUID& service);
+void RecordGetPrimaryServiceService(
+    const base::Optional<device::BluetoothUUID>& service);
 // There should be a call to this function for every call to
 // Send(BluetoothMsg_GetPrimaryServiceSuccess) and
 // Send(BluetoothMsg_GetPrimaryServiceError).
@@ -179,7 +180,7 @@ void RecordGetCharacteristicsOutcome(
 // Records the UUID of the characteristic used when calling getCharacteristic.
 void RecordGetCharacteristicsCharacteristic(
     blink::mojom::WebBluetoothGATTQueryQuantity quantity,
-    const std::string& characteristic);
+    const base::Optional<device::BluetoothUUID>& characteristic);
 
 // GATT Operations Metrics