Add webusb notification UI unit tests

components/webusb/webusb_browser_client.h

 // 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.
 
 #ifndef COMPONENTS_WEBUSB_WEBUSB_BROWSER_CLIENT_H_
 #define COMPONENTS_WEBUSB_WEBUSB_BROWSER_CLIENT_H_
 
 #include <string>
 
-#include "base/macros.h"
 #include "base/strings/string16.h"
 
 class GURL;
 
 namespace webusb {
 
 // Interface to allow the webusb module to make browser-process-specific
 // calls.
 class WebUsbBrowserClient {
  public:
   virtual ~WebUsbBrowserClient() {}
 
   virtual void OnDeviceAdded(const base::string16& product_name,
                              const GURL& landing_page,
                              const std::string& notification_id) = 0;
 
   virtual void OnDeviceRemoved(const std::string& notification_id) = 0;
 };
 
 }  // namespace webusb
 
 #endif  // COMPONENTS_WEBUSB_WEBUSB_BROWSER_CLIENT_H_