Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/media/media_capture_devices_dispatcher.cc

Index: chrome/browser/media/media_capture_devices_dispatcher.cc
diff --git a/chrome/browser/media/media_capture_devices_dispatcher.cc b/chrome/browser/media/media_capture_devices_dispatcher.cc
index ec8043d89d50ea3d6b82fa81af7ccbbd3aacacf2..851b456bfdc85dc0aa8a407902dd27285ad1db21 100644
--- a/chrome/browser/media/media_capture_devices_dispatcher.cc
+++ b/chrome/browser/media/media_capture_devices_dispatcher.cc
@@ -290,14 +290,10 @@ MediaCaptureDevicesDispatcher::~MediaCaptureDevicesDispatcher() {}
 
 void MediaCaptureDevicesDispatcher::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterStringPref(
-      prefs::kDefaultAudioCaptureDevice,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterStringPref(
-      prefs::kDefaultVideoCaptureDevice,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kDefaultAudioCaptureDevice,
+                               std::string());
+  registry->RegisterStringPref(prefs::kDefaultVideoCaptureDevice,
+                               std::string());
 }
 
 void MediaCaptureDevicesDispatcher::AddObserver(Observer* observer) {