Linux: use generated library loader for gsettings.

build/linux/gsettings.h

+// 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.
+
+#ifndef BUILD_LINUX_GSETTINGS_H_
+#define BUILD_LINUX_GSETTINGS_H_
+
+#include <gio/gio.h>
+
+// The GSettings API was not part of GIO until GIO version 2.26,
+// while Ubuntu 10.04 Lucid ships with version 2.24.
+//
+// To allow compiling on Lucid those forward declarations are provided.
+//
+// If compiling with GIO version 2.26, these won't conflict,
+// because they're identical to the types defined.
+//
+// TODO(phajdan.jr): This will no longer be needed after switch to Precise,
+// see http://crbug.com/158577 .
+struct _GSettings;
+typedef struct _GSettings GSettings;
+GSettings* g_settings_new(const gchar* schema);
+GSettings* g_settings_get_child(GSettings* settings, const gchar* name);
+gboolean g_settings_get_boolean(GSettings* settings, const gchar* key);
+gchar* g_settings_get_string(GSettings* settings, const gchar* key);
+gint g_settings_get_int(GSettings* settings, const gchar* key);
+gchar** g_settings_get_strv(GSettings* settings, const gchar* key);
+const gchar* const* g_settings_list_schemas();
+
+#endif  // BUILD_LINUX_GSETTINGS_H_