Use devtools to set user agent in chromedriver

chrome/test/chromedriver/chrome/chrome_impl.cc

 // Copyright (c) 2012 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_impl.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "chrome/test/chromedriver/chrome/devtools_client.h"
@@ skipping 92 matching lines @@
         for (ScopedVector<DevToolsEventListener>::const_iterator listener =
                  devtools_event_listeners_.begin();
              listener != devtools_event_listeners_.end(); ++listener) {
           client->AddListener(*listener);
           // OnConnected will fire when DevToolsClient connects later.
         }
         CHECK(!page_load_strategy_.empty());
         web_views_.push_back(make_linked_ptr(new WebViewImpl(
             view.id, w3c_compliant, devtools_http_client_->browser_info(),
             std::move(client), devtools_http_client_->device_metrics(),
-            page_load_strategy_)));
+            page_load_strategy_, devtools_http_client_->user_agent())));
       }
     }
   }
 }
 
 Status ChromeImpl::GetWebViewById(const std::string& id, WebView** web_view) {
   for (WebViewList::iterator it = web_views_.begin();
        it != web_views_.end(); ++it) {
     if ((*it)->GetId() == id) {
       *web_view = (*it).get();
@@ skipping 47 matching lines @@
     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
     std::unique_ptr<PortReservation> port_reservation,
     std::string page_load_strategy)
     : quit_(false),
       devtools_http_client_(std::move(http_client)),
       devtools_websocket_client_(std::move(websocket_client)),
       port_reservation_(std::move(port_reservation)),
       page_load_strategy_(page_load_strategy) {
   devtools_event_listeners_.swap(devtools_event_listeners);
 }