Use devtools to set user agent in chromedriver

chrome/test/chromedriver/capabilities.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/capabilities.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 96 matching lines @@
 
   if (status.IsError()) {
     return Status(kUnknownError,
                   "'" + device_name + "' must be a valid device",
                   status);
   }
 
   capabilities->device_metrics.reset(device->device_metrics.release());
   // Don't override the user agent if blank (like for notebooks).
   if (!device->user_agent.empty())
-    capabilities->switches.SetSwitch("user-agent", device->user_agent);
+    capabilities->user_agent = device->user_agent;
 
   return Status(kOk);
 }
 
 Status ParseMobileEmulation(const base::Value& option,
                             Capabilities* capabilities) {
   const base::DictionaryValue* mobile_emulation;
   if (!option.GetAsDictionary(&mobile_emulation))
     return Status(kUnknownError, "'mobileEmulation' must be a dictionary");
 
@@ skipping 40 matching lines @@
         new DeviceMetrics(width, height, device_scale_factor, touch, mobile);
     capabilities->device_metrics =
         std::unique_ptr<DeviceMetrics>(device_metrics);
   }
 
   if (mobile_emulation->HasKey("userAgent")) {
     std::string user_agent;
     if (!mobile_emulation->GetString("userAgent", &user_agent))
       return Status(kUnknownError, "'userAgent' must be a string");
 
-    capabilities->switches.SetSwitch("user-agent", user_agent);
+    capabilities->user_agent = user_agent;
   }
 
   return Status(kOk);
 }
 
 Status ParsePageLoadStrategy(const base::Value& option,
                              Capabilities* capabilities) {
   if (!option.GetAsString(&capabilities->page_load_strategy))
     return Status(kUnknownError, "must be a string");
   if (capabilities->page_load_strategy == PageLoadStrategy::kNormal ||
@@ skipping 468 matching lines @@
   if (iter == logging_prefs.end() || iter->second == Log::kOff) {
     const base::DictionaryValue* chrome_options = NULL;
     if (desired_caps.GetDictionary("chromeOptions", &chrome_options) &&
         chrome_options->HasKey("perfLoggingPrefs")) {
       return Status(kUnknownError, "perfLoggingPrefs specified, "
                     "but performance logging was not enabled");
     }
   }
   return Status(kOk);
 }