Revert of Move base/prefs to components/prefs

base/prefs/pref_store.cc

Index: base/prefs/pref_store.cc
diff --git a/base/prefs/pref_store.cc b/base/prefs/pref_store.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f286a3313260a6b7db035955872825e73ce2a95c
--- /dev/null
+++ b/base/prefs/pref_store.cc
@@ -0,0 +1,13 @@
+// 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 "base/prefs/pref_store.h"
+
+bool PrefStore::HasObservers() const {
+  return false;
+}
+
+bool PrefStore::IsInitializationComplete() const {
+  return true;
+}