[chromedriver] Pass --test-type=webdriver when launching Chrome

chrome/test/chromedriver/chrome_launcher.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_launcher.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 98 matching lines @@
   switches.SetSwitch("safebrowsing-disable-auto-update");
   switches.SetSwitch("safebrowsing-disable-download-protection");
   switches.SetSwitch("disable-client-side-phishing-detection");
   switches.SetSwitch("disable-component-update");
   switches.SetSwitch("disable-default-apps");
   switches.SetSwitch("enable-logging");
   switches.SetSwitch("logging-level", "1");
   switches.SetSwitch("password-store", "basic");
   switches.SetSwitch("use-mock-keychain");
   switches.SetSwitch("remote-debugging-port", base::IntToString(port));
+  switches.SetSwitch("test-type", "webdriver");
 
   for (std::set<std::string>::const_iterator iter =
            capabilities.exclude_switches.begin();
        iter != capabilities.exclude_switches.end();
        ++iter) {
     switches.RemoveSwitch(*iter);
   }
   switches.SetFromSwitches(capabilities.switches);
 
   if (!switches.HasSwitch("user-data-dir")) {
@@ skipping 588 matching lines @@
   // Write empty "First Run" file, otherwise Chrome will wipe the default
   // profile that was written.
   if (base::WriteFile(
           user_data_dir.Append(chrome::kFirstRunSentinel), "", 0) != 0) {
     return Status(kUnknownError, "failed to write first run file");
   }
   return Status(kOk);
 }
 
 }  // namespace internal