Index: public/common/common_param_traits_macros.h
===================================================================
--- public/common/common_param_traits_macros.h	(revision 280796)
+++ public/common/common_param_traits_macros.h	(working copy)
@@ -175,6 +175,7 @@
   IPC_STRUCT_TRAITS_MEMBER(initialize_at_minimum_page_scale)
   IPC_STRUCT_TRAITS_MEMBER(smart_insert_delete_enabled)
   IPC_STRUCT_TRAITS_MEMBER(compositor_touch_hit_testing)
+  IPC_STRUCT_TRAITS_MEMBER(base_background_color)
   IPC_STRUCT_TRAITS_MEMBER(cookie_enabled)
   IPC_STRUCT_TRAITS_MEMBER(navigate_on_drag_drop)
   IPC_STRUCT_TRAITS_MEMBER(spatial_navigation_enabled)
Index: renderer/web_preferences.cc
===================================================================
--- renderer/web_preferences.cc	(revision 280796)
+++ renderer/web_preferences.cc	(working copy)
@@ -167,6 +167,8 @@
 
   settings->setJavaEnabled(prefs.java_enabled);
 
+  web_view->setBaseBackgroundColor(prefs.base_background_color);
+
   // By default, allow_universal_access_from_file_urls is set to false and thus
   // we mitigate attacks from local HTML files by not granting file:// URLs
   // universal access. Only test shell will enable this.