re-apply r34183...

chrome/browser/renderer_preferences_util.cc

+// Copyright (c) 2009 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 "chrome/browser/renderer_preferences_util.h"
+
+#include "base/singleton.h"
+#include "chrome/browser/profile.h"
+
+#if defined(OS_LINUX)
+#include "chrome/browser/gtk/gtk_theme_provider.h"
+#include "chrome/common/gtk_util.h"
+#endif
+
+namespace renderer_preferences_util {
+
+RendererPreferences GetInitedRendererPreferences(Profile* profile) {
+  RendererPreferences* prefs = Singleton<RendererPreferences>::get();
+#if defined(OS_LINUX)
+  static bool inited = false;
+  if (!inited) {
+    gtk_util::InitRendererPrefsFromGtkSettings(prefs,
+      GtkThemeProvider::GetFrom(profile)->UseGtkTheme());
+    inited = true;
+  }
+#endif
+  return *prefs;
+}
+
+}  // renderer_preferences_util