[headless] Make --hide-scrollbars affect all BrowserContexts.

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 43 matching lines @@
 
 const base::FilePath& HeadlessBrowserContextOptions::user_data_dir() const {
   return ReturnOverriddenValue(user_data_dir_, browser_options_->user_data_dir);
 }
 
 bool HeadlessBrowserContextOptions::incognito_mode() const {
   return ReturnOverriddenValue(incognito_mode_,
                                browser_options_->incognito_mode);
 }
 
+const base::Callback<void(WebPreferences*)>&
+HeadlessBrowserContextOptions::override_web_preferences_callback() const {
+  return ReturnOverriddenValue(
+      override_web_preferences_callback_,
+      browser_options_->override_web_preferences_callback);
+}
+
 const ProtocolHandlerMap& HeadlessBrowserContextOptions::protocol_handlers()
     const {
   return protocol_handlers_;
 }
 
 ProtocolHandlerMap HeadlessBrowserContextOptions::TakeProtocolHandlers() {
   return std::move(protocol_handlers_);
 }
 
-const base::Callback<void(WebPreferences*)>&
-HeadlessBrowserContextOptions::override_web_preferences_callback() const {
-  return override_web_preferences_callback_;
-}
-
 }  // namespace headless