Use devtools to set user agent in chromedriver

chrome/test/chromedriver/chrome/chrome_desktop_impl.cc

 // Copyright (c) 2013 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 "chrome/test/chromedriver/chrome/chrome_desktop_impl.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/files/file_path.h"
@@ skipping 130 matching lines @@
 
   const DeviceMetrics* device_metrics = devtools_http_client_->device_metrics();
   if (type == WebViewInfo::Type::kApp ||
       type == WebViewInfo::Type::kBackgroundPage) {
     // Apps and extensions don't work on Android, so it doesn't make sense to
     // provide override device metrics in mobile emulation mode, and can also
     // potentially crash the renderer, for more details see:
     // https://code.google.com/p/chromedriver/issues/detail?id=1205
     device_metrics = nullptr;
   }
-  std::unique_ptr<WebView> web_view_tmp(
-      new WebViewImpl(id, w3c_compliant, devtools_http_client_->browser_info(),
-                      devtools_http_client_->CreateClient(id), device_metrics,
-                      page_load_strategy()));
+  std::unique_ptr<WebView> web_view_tmp(new WebViewImpl(
+      id, w3c_compliant, devtools_http_client_->browser_info(),
+      devtools_http_client_->CreateClient(id), device_metrics,
+      page_load_strategy(), devtools_http_client_->user_agent()));
   Status status = web_view_tmp->ConnectIfNecessary();
   if (status.IsError())
     return status;
 
   status = web_view_tmp->WaitForPendingNavigations(
       std::string(), timeout, false);
   if (status.IsOk())
     *web_view = std::move(web_view_tmp);
   return status;
 }
@@ skipping 59 matching lines @@
 }
 
 int ChromeDesktopImpl::GetNetworkConnection() const {
   return network_connection_;
 }
 
 void ChromeDesktopImpl::SetNetworkConnection(
     int network_connection) {
   network_connection_ = network_connection;
 }