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

chrome/browser/extensions/api/preference/preference_api.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/browser/extensions/api/preference/preference_api.h"
 
 #include <map>
 #include <utility>
 
 #include "base/lazy_instance.h"
@@ skipping 101 matching lines @@
      APIPermission::kPrivacy},
     {"searchSuggestEnabled", prefs::kSearchSuggestEnabled,
      APIPermission::kPrivacy, APIPermission::kPrivacy},
     {"spellingServiceEnabled", prefs::kSpellCheckUseSpellingService,
      APIPermission::kPrivacy, APIPermission::kPrivacy},
     {"thirdPartyCookiesAllowed", prefs::kBlockThirdPartyCookies,
      APIPermission::kPrivacy, APIPermission::kPrivacy},
     {"translationServiceEnabled", prefs::kEnableTranslate,
      APIPermission::kPrivacy, APIPermission::kPrivacy},
 #if defined(ENABLE_WEBRTC)
-    {"webRTCMultipleRoutesEnabled", prefs::kWebRTCMultipleRoutesEnabled,
-     APIPermission::kPrivacy, APIPermission::kPrivacy},
-    {"webRTCNonProxiedUdpEnabled", prefs::kWebRTCNonProxiedUdpEnabled,

[pthatcher1, 2015/10/21 00:06:53]

Is this going to break the existing Network Limiter extension?  How are we going
to transition the extension to the new API?  Can the extension do version
checks?

[juberti2, 2015/10/21 00:58:40]

Agree with this concern. I think we need to handle the case where the IP
handling policy is set, or, if not set, check for the old multiple routes
preference. Otherwise, users who set the pref manually and old extension users
will regress when the new version of Chrome rolls out.

+    {"webRTCIPHandlingPolicy", prefs::kWebRTCIPHandlingPolicy,
      APIPermission::kPrivacy, APIPermission::kPrivacy},
 #endif
     // accessibilityFeatures.animationPolicy is available for
     // all platforms but the others from accessibilityFeatures
     // is only available for OS_CHROMEOS.
     {"animationPolicy", prefs::kAnimationPolicy,
      APIPermission::kAccessibilityFeaturesRead,
      APIPermission::kAccessibilityFeaturesModify},
 #if defined(OS_CHROMEOS)
     {"autoclick", prefs::kAccessibilityAutoclickEnabled,
@@ skipping 649 matching lines @@
           pref_key, PreferenceFunction::PERMISSION_TYPE_WRITE, &browser_pref)) {
     return false;
   }
 
   PreferenceAPI::Get(GetProfile())
       ->RemoveExtensionControlledPref(extension_id(), browser_pref, scope);
   return true;
 }
 
 }  // namespace extensions