Revert of Merge apps/pref* to extensions/browser/pref*

apps/pref_names.cc

Index: apps/pref_names.cc
diff --git a/apps/pref_names.cc b/apps/pref_names.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ea08c76ba4ad271e4bd51491c4737c93cf49956e
--- /dev/null
+++ b/apps/pref_names.cc
@@ -0,0 +1,17 @@
+// Copyright 2013 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 "apps/pref_names.h"
+
+namespace apps {
+
+namespace prefs {
+
+// A boolean that tracks whether apps are allowed to enter fullscreen mode.
+extern const char kAppFullscreenAllowed[] =
+    "apps.fullscreen.allowed";
+
+}  // namespace prefs
+
+}  // namespace apps