Use new wrapper types for web_bluetooth.mojom

content/common/bluetooth/web_bluetooth_device_id.h

Index: content/common/bluetooth/web_bluetooth_device_id.h
diff --git a/content/common/bluetooth/web_bluetooth_device_id.h b/content/common/bluetooth/web_bluetooth_device_id.h
index 2de12a022dfc22bc981306944568b5316ca5df9d..a61b90a625c0449a13fe2c7a0c49f89bd88d2bba 100644
--- a/content/common/bluetooth/web_bluetooth_device_id.h
+++ b/content/common/bluetooth/web_bluetooth_device_id.h
@@ -43,10 +43,6 @@ class CONTENT_EXPORT WebBluetoothDeviceId {
   std::string device_id_;
 };
 
-// This is required by gtest to print a readable output on test failures.
-CONTENT_EXPORT std::ostream& operator<<(std::ostream& out,
-                                        const WebBluetoothDeviceId& device_id);
-
 struct WebBluetoothDeviceIdHash {
   size_t operator()(const WebBluetoothDeviceId& device_id) const {
     return std::hash<std::string>()(device_id.str());