- 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/renderer_prefs.h

@@ -0,0 +1,39 @@
+// Copyright (c) 2010 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_RENDERER_PREFS_H_
+#define CEF_LIBCEF_BROWSER_PREFS_RENDERER_PREFS_H_
+#pragma once
+
+#include "include/internal/cef_types_wrappers.h"
+
+class CommandLinePrefStore;
+
+namespace content {
+class RenderViewHost;
+struct WebPreferences;
+}
+
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
+namespace renderer_prefs {
+
+// Register additional renderer-related preferences.
+void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
+// Set default values based on CEF command-line flags for preferences that are
+// available via the PrefService. Chromium command-line flags should not exist
+// for these preferences.
+void SetCommandLinePrefDefaults(CommandLinePrefStore* prefs);
+
+// Populate WebPreferences based on a combination of command-line values,
+// PrefService and CefBrowserSettings.
+void PopulateWebPreferences(content::RenderViewHost* rvh,
+                            content::WebPreferences& web);
+
+}  // namespace renderer_prefs
+
+#endif  // CEF_LIBCEF_BROWSER_PREFS_RENDERER_PREFS_H_