Change WebRTC IP handling policy from multiple booleans to an enum.

chrome/browser/ui/prefs/prefs_tab_helper.cc

Index: chrome/browser/ui/prefs/prefs_tab_helper.cc
diff --git a/chrome/browser/ui/prefs/prefs_tab_helper.cc b/chrome/browser/ui/prefs/prefs_tab_helper.cc
index 5cb2d6e067ac12b6808f94468a13a7d948ee9be2..35e21f95f43f085ffc92598dc18655521d310a3b 100644
--- a/chrome/browser/ui/prefs/prefs_tab_helper.cc
+++ b/chrome/browser/ui/prefs/prefs_tab_helper.cc
@@ -335,9 +335,7 @@ class PrefWatcher : public KeyedService {
     pref_change_registrar_.Add(prefs::kEnableReferrers, renderer_callback);
 
 #if defined(ENABLE_WEBRTC)
-    pref_change_registrar_.Add(prefs::kWebRTCMultipleRoutesEnabled,
-                               renderer_callback);
-    pref_change_registrar_.Add(prefs::kWebRTCNonProxiedUdpEnabled,
+    pref_change_registrar_.Add(prefs::kWebRTCIPHandlingPolicy,
                                renderer_callback);
 #endif