Use new wrapper types for web_bluetooth.mojom

content/common/bluetooth/web_bluetooth_device_id.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_COMMON_BLUETOOTH_WEB_BLUETOOTH_DEVICE_ID_H_
 #define CONTENT_COMMON_BLUETOOTH_WEB_BLUETOOTH_DEVICE_ID_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
@@ skipping 25 matching lines @@
   // Returns true if base64-decoding |device_id| results in a 128bit string.
   static bool IsValid(const std::string& device_id);
 
   bool operator==(const WebBluetoothDeviceId& device_id) const;
   bool operator!=(const WebBluetoothDeviceId& device_id) const;
 
  private:
   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());
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_BLUETOOTH_WEB_BLUETOOTH_DEVICE_ID_H_