Add policy to control valid UDP port range in WebRTC

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.
@@ skipping 84 matching lines @@
   bool enable_referrers;
 
   // Set to true to indicate that the preference to set DNT to 1 is enabled.
   bool enable_do_not_track;
 
   // This is the IP handling policy override for WebRTC. The value must be one
   // of the strings defined in privacy.json. The allowed values are specified
   // in webrtc_ip_handling_policy.h.
   std::string webrtc_ip_handling_policy;
 
+  // This is the range of UDP ports allowed to be used by WebRTC. A value of
+  // zero in both fields means all ports are allowed.
+  uint16_t webrtc_udp_min_port;
+  uint16_t webrtc_udp_max_port;
+
   // 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;
 
   // The accept-languages of the browser, comma-separated.
   std::string accept_languages;
 
   // Specifies whether the renderer reports frame name changes to the browser
   // process.
   // TODO(fsamuel): This is a short-term workaround to avoid regressing
@@ skipping 54 matching lines @@
   int32_t arrow_bitmap_width_horizontal_scroll_bar_in_dips;
 #endif
 
   // The default font size used for rendering on Linux.
   int default_font_size;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RENDERER_PREFERENCES_H_