Don't hardcode copy of root cert in chromeos/login/test/https_forwarder.cc.

chrome/browser/chromeos/login/test/https_forwarder.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_LOGIN_TEST_HTTPS_FORWARDER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_TEST_HTTPS_FORWARDER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "url/gurl.h"
 
+namespace net {
+class ScopedTestRoot;
+}
+
 namespace chromeos {
 
 class ForwardingServer;
 
 // An https test server that forwards all requests to another server. This
 // allows a server that supports http only to be accessed over https.
 //
 // The server will bind to |127.0.0.1| but will present a certificate issued to
 // |ssl_host|.
 class HTTPSForwarder {
  public:
   HTTPSForwarder();
   ~HTTPSForwarder();
 
   // Returns a URL that uses |ssl_host_| as the host.
   GURL GetURLForSSLHost(const std::string& path) const;
 
   bool Initialize(const std::string& ssl_host,
                   const GURL& forward_target) WARN_UNUSED_RESULT;
 
  private:
   std::string ssl_host_;
 
+  std::unique_ptr<net::ScopedTestRoot> test_root_;
   std::unique_ptr<ForwardingServer> forwarding_server_;
 
   DISALLOW_COPY_AND_ASSIGN(HTTPSForwarder);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_TEST_HTTPS_FORWARDER_H_