Update RenderPreferences on GTK change.

chrome/browser/chromeos/main_menu.cc

Index: chrome/browser/chromeos/main_menu.cc
diff --git a/chrome/browser/chromeos/main_menu.cc b/chrome/browser/chromeos/main_menu.cc
index f4bdcaf5aec7175428371435f7710f655fd68a62..a2ec8c5bf2a470d8c5d9c426a4b7da176dedd52a 100644
--- a/chrome/browser/chromeos/main_menu.cc
+++ b/chrome/browser/chromeos/main_menu.cc
@@ -245,7 +245,9 @@ void MainMenu::RequestMove(const gfx::Rect& new_bounds) {
 }
 
 RendererPreferences MainMenu::GetRendererPrefs(Profile* profile) const {
-  return renderer_preferences_util::GetInitedRendererPreferences(profile);
+  RendererPreferences preferences;
+  renderer_preferences_util::UpdateFromSystemSettings(&preferences, profile);
+  return preferences;
 }
 
 void MainMenu::CreateNewWindow(int route_id) {