Transfer user agent override info between browser and renderer

content/public/common/renderer_preferences.h

 // Copyright (c) 2012 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.
 //
 // A struct for managing browser's settings that apply to the renderer or its
 // webview.  These differ from WebPreferences since they apply to Chromium's
 // glue layer rather than applying to just WebKit.
 //
 // Adding new values to this class probably involves updating
 // common/view_messages.h, browser/browser.cc, etc.
 
 #ifndef CONTENT_PUBLIC_COMMON_RENDERER_PREFERENCES_H_
 #define CONTENT_PUBLIC_COMMON_RENDERER_PREFERENCES_H_
 #pragma once
 
+#include <string>
+
 #include "content/common/content_export.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace content {
 
 enum RendererPreferencesHintingEnum {
   RENDERER_PREFERENCES_HINTING_SYSTEM_DEFAULT = 0,
   RENDERER_PREFERENCES_HINTING_NONE,
   RENDERER_PREFERENCES_HINTING_SLIGHT,
   RENDERER_PREFERENCES_HINTING_MEDIUM,
@@ skipping 56 matching lines @@
   // Cursor blink rate in seconds.
   // Currently only changed from default on Linux.  Uses |gtk-cursor-blink|
   // from GtkSettings.
   double caret_blink_interval;
 
   // Set to false to not send referrers.
   bool enable_referrers;
 
   // Default page zoom level.
   double default_zoom_level;
+
+  // The user agent given to WebKit when it requests one and the user agent is
+  // being overridden for the current navigation.
+  std::string user_agent_override;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RENDERER_PREFERENCES_H_