- Support runtime configuration of renderer-related preferences (issue #1501).

- Persist modified user preferences including per-host zoom settings when a
  cache_path value is specified and persist_user_preferences is set to true
  via CefSettings or CefRequestContextSettings.
- Avoid the need to duplicate files from chrome/ by having CefBrowserContext
  extend Chrome's Profile class.

libcef/browser/prefs/browser_prefs.h

@@ -0,0 +1,26 @@
+// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that can
+// be found in the LICENSE file.
+
+#ifndef CEF_LIBCEF_BROWSER_PREFS_BROWSER_PREFS_H_
+#define CEF_LIBCEF_BROWSER_PREFS_BROWSER_PREFS_H_
+
+#include "base/memory/scoped_ptr.h"
+
+class PrefService;
+
+namespace base {
+class FilePath;
+}
+
+namespace browser_prefs {
+
+// Name for the user prefs JSON file.
+extern const char kUserPrefsFileName[];
+
+// Create the PrefService used to manage pref registration and storage.
+scoped_ptr<PrefService> CreatePrefService(const base::FilePath& pref_path);
+
+}  // namespace browser_prefs
+
+#endif  // CEF_LIBCEF_BROWSER_PREFS_BROWSER_PREFS_H_