'break' statement after 'return' is not required.

base/prefs/json_pref_store.cc

Index: base/prefs/json_pref_store.cc
diff --git a/base/prefs/json_pref_store.cc b/base/prefs/json_pref_store.cc
index 74d51443ddd2cc424e429162e389702092772472..1ece3cb314b26fe45040953afe60f79e21ef2a83 100644
--- a/base/prefs/json_pref_store.cc
+++ b/base/prefs/json_pref_store.cc
@@ -60,16 +60,12 @@ PersistentPrefStore::PrefReadError HandleReadErrors(
     switch (error_code) {
       case JSONFileValueDeserializer::JSON_ACCESS_DENIED:
         return PersistentPrefStore::PREF_READ_ERROR_ACCESS_DENIED;
-        break;
       case JSONFileValueDeserializer::JSON_CANNOT_READ_FILE:
         return PersistentPrefStore::PREF_READ_ERROR_FILE_OTHER;
-        break;
       case JSONFileValueDeserializer::JSON_FILE_LOCKED:
         return PersistentPrefStore::PREF_READ_ERROR_FILE_LOCKED;
-        break;
       case JSONFileValueDeserializer::JSON_NO_SUCH_FILE:
         return PersistentPrefStore::PREF_READ_ERROR_NO_FILE;
-        break;
       default:
         // JSON errors indicate file corruption of some sort.
         // Since the file is corrupt, move it to the side and continue with