Create a new preference which disables UDP protocol for WebRTC

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 1175 matching lines @@
 const char kCopresenceAnonymousDeviceId[] = "apps.copresence.unauth_device_id";
 
 // Used to indicate whether or not the toolbar redesign bubble has been shown
 // and acknowledged, and the last time the bubble was shown.
 const char kToolbarIconSurfacingBubbleAcknowledged[] =
     "toolbar_icon_surfacing_bubble_acknowledged";
 const char kToolbarIconSurfacingBubbleLastShowTime[] =
     "toolbar_icon_surfacing_bubble_show_time";
 #endif
 
+#if defined(ENABLE_WEBRTC)
 // Whether WebRTC should bind to individual NICs to explore all possible routing
 // options. Default is true.
-#if defined(ENABLE_WEBRTC)
 const char kWebRTCMultipleRoutesEnabled[] = "webrtc.multiple_routes_enabled";
+// Whether WebRTC can use nonproxied UDP to connect. When this is true, WebRTC
+// will use UDP transport which doesn't use proxy and might leak IP addresses
+// when no UDP-supporting proxy is configured. Default is true.
+const char kWebRTCNonProxiedUdpTransportEnabled[] =

[pthatcher2, 2015/08/26 21:09:59]

Might be more clear as "Whether WebRTC should use non-proxied UDP. If false,
WebRTC will not send UDP unless it goes through a proxy.  If no UDP proxy is
configured, it will not send UDP.  If true, WebRTC will send UDP regardless of
whether or not a proxy is configured."

+    "webrtc.nonproxied_udp_transport_enabled";
 #endif
 
 // *************** LOCAL STATE ***************
 // These are attached to the machine/installation
 
 // A pref to configure networks device-wide. Its value must be a list of
 // NetworkConfigurations according to the OpenNetworkConfiguration
 // specification.
 // Currently, this pref is only used to store the policy. The user's
 // configuration is still stored in Shill.
@@ skipping 1003 matching lines @@
     "supervised_users.whitelists";
 
 #if defined(ENABLE_EXTENSIONS)
 // Policy that indicates how to handle animated images.
 const char kAnimationPolicy[] = "settings.a11y.animation_policy";
 #endif
 
 const char kBackgroundTracingLastUpload[] = "background_tracing.last_upload";
 
 }  // namespace prefs