Move enable_webrtc to a buildflag header.

chrome/browser/ui/browser_ui_prefs.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/ui/browser_ui_prefs.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/translate/core/common/translate_pref_names.h"
 #include "content/public/common/webrtc_ip_handling_policy.h"
+#include "media/media_features.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
 namespace {
 
 uint32_t GetHomeButtonAndHomePageIsNewTabPageFlags() {
 #if defined(OS_IOS) || defined(OS_ANDROID)
   return PrefRegistry::NO_REGISTRATION_FLAGS;
@@ skipping 46 matching lines @@
   registry->RegisterBooleanPref(prefs::kImportAutofillFormData, true);
   registry->RegisterBooleanPref(prefs::kImportBookmarks, true);
   registry->RegisterBooleanPref(prefs::kImportHistory, true);
   registry->RegisterBooleanPref(prefs::kImportHomepage, true);
   registry->RegisterBooleanPref(prefs::kImportSavedPasswords, true);
   registry->RegisterBooleanPref(prefs::kImportSearchEngine, true);
   registry->RegisterBooleanPref(
       prefs::kEnableDoNotTrack,
       false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   // TODO(guoweis): Remove next 2 options at M50.
   registry->RegisterBooleanPref(prefs::kWebRTCMultipleRoutesEnabled, true);
   registry->RegisterBooleanPref(prefs::kWebRTCNonProxiedUdpEnabled, true);
   registry->RegisterStringPref(prefs::kWebRTCIPHandlingPolicy,
                                content::kWebRTCIPHandlingDefault);
   registry->RegisterStringPref(prefs::kWebRTCUDPPortRange, std::string());
 #endif
 
   // Dictionaries to keep track of default tasks in the file browser.
   registry->RegisterDictionaryPref(
@@ skipping 26 matching lines @@
   registry->RegisterBooleanPref(
       prefs::kHideFullscreenToolbar,
       false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 #else
   registry->RegisterBooleanPref(prefs::kFullscreenAllowed, true);
 #endif
 }
 
 }  // namespace chrome