Add the ability to schedule any pending lossy prefs to be written.

chrome/browser/prefs/leveldb_pref_store.cc

Index: chrome/browser/prefs/leveldb_pref_store.cc
diff --git a/chrome/browser/prefs/leveldb_pref_store.cc b/chrome/browser/prefs/leveldb_pref_store.cc
index bdeb3e394a5274680105bd5240dae57678439ee0..535112a58d1c36d21f24de9afb7ac111333f3e12 100644
--- a/chrome/browser/prefs/leveldb_pref_store.cc
+++ b/chrome/browser/prefs/leveldb_pref_store.cc
@@ -356,6 +356,10 @@ void LevelDBPrefStore::CommitPendingWrite() {
   }
 }
 
+void LevelDBPrefStore::SchedulePendingLossyWrites() {
+  // LevelDBPrefStore does not support lossy prefs.
+}
+
 void LevelDBPrefStore::MarkForDeletion(const std::string& key) {
   if (read_only_)
     return;