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

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

Index: chrome/browser/chromeos/login/test/https_forwarder.h
diff --git a/chrome/browser/chromeos/login/test/https_forwarder.h b/chrome/browser/chromeos/login/test/https_forwarder.h
index aa7eb9751ab6bedd3a8a043304597b23b3196909..a04a5fde69c64c68f9be00dbedd4fbf8d076e797 100644
--- a/chrome/browser/chromeos/login/test/https_forwarder.h
+++ b/chrome/browser/chromeos/login/test/https_forwarder.h
@@ -12,6 +12,10 @@
 #include "base/macros.h"
 #include "url/gurl.h"
 
+namespace net {
+class ScopedTestRoot;
+}
+
 namespace chromeos {
 
 class ForwardingServer;
@@ -35,6 +39,7 @@ class HTTPSForwarder {
  private:
   std::string ssl_host_;
 
+  std::unique_ptr<net::ScopedTestRoot> test_root_;
   std::unique_ptr<ForwardingServer> forwarding_server_;
 
   DISALLOW_COPY_AND_ASSIGN(HTTPSForwarder);