Add webusb notification UI unit tests

device/usb/mock_usb_device.cc

 // Copyright 2015 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.
 
 #include "device/usb/mock_usb_device.h"
 
 #include "base/strings/utf_string_conversions.h"
 
 namespace device {
 
 MockUsbDevice::MockUsbDevice(uint16 vendor_id, uint16 product_id)
     : MockUsbDevice(vendor_id, product_id, "", "", "") {
 }
 
 MockUsbDevice::MockUsbDevice(uint16 vendor_id,
                              uint16 product_id,
                              const std::string& manufacturer_string,
                              const std::string& product_string,
                              const std::string& serial_number)
     : UsbDevice(vendor_id,
                 product_id,
                 base::UTF8ToUTF16(manufacturer_string),
                 base::UTF8ToUTF16(product_string),
                 base::UTF8ToUTF16(serial_number)) {
 }
 
+MockUsbDevice::MockUsbDevice(uint16 vendor_id,
+                             uint16 product_id,
+                             const std::string& manufacturer_string,
+                             const std::string& product_string,
+                             const std::string& serial_number,
+                             const GURL& webusb_landing_page)
+    : UsbDevice(vendor_id,
+                product_id,
+                base::UTF8ToUTF16(manufacturer_string),
+                base::UTF8ToUTF16(product_string),
+                base::UTF8ToUTF16(serial_number)) {
+  webusb_landing_page_ = webusb_landing_page;
+}
+
 MockUsbDevice::~MockUsbDevice() {
 }
 
 }  // namespace device