Remove user agent from HeadlessBrowserContextOptions.

headless/lib/browser/headless_browser_context_options.cc

 // Copyright 2016 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 "headless/lib/browser/headless_browser_context_options.h"
 
 #include <string>
 #include <utility>
 
 namespace headless {
@@ skipping 24 matching lines @@
     HeadlessBrowser::Options* options)
     : browser_options_(options) {}
 
 const std::string& HeadlessBrowserContextOptions::product_name_and_version()
     const {
   return ReturnOverriddenValue(product_name_and_version_,
                                browser_options_->product_name_and_version);
 }
 
 const std::string& HeadlessBrowserContextOptions::user_agent() const {
-  return ReturnOverriddenValue(user_agent_, browser_options_->user_agent);
+  return browser_options_->user_agent;
 }
 
 const net::HostPortPair& HeadlessBrowserContextOptions::proxy_server() const {
   return ReturnOverriddenValue(proxy_server_, browser_options_->proxy_server);
 }
 
 const std::string& HeadlessBrowserContextOptions::host_resolver_rules() const {
   return ReturnOverriddenValue(host_resolver_rules_,
                                browser_options_->host_resolver_rules);
 }
@@ skipping 21 matching lines @@
 const ProtocolHandlerMap& HeadlessBrowserContextOptions::protocol_handlers()
     const {
   return protocol_handlers_;
 }
 
 ProtocolHandlerMap HeadlessBrowserContextOptions::TakeProtocolHandlers() {
   return std::move(protocol_handlers_);
 }
 
 }  // namespace headless