src/patch/patches/prefs_content_1161.patch

diff --git content/public/common/common_param_traits_macros.h content/public/common/common_param_traits_macros.h
index 0e67ad3c7431..de0bb8e1a824 100644
--- content/public/common/common_param_traits_macros.h
+++ content/public/common/common_param_traits_macros.h
@@ -177,6 +177,7 @@ IPC_STRUCT_TRAITS_BEGIN(content::WebPreferences)
   IPC_STRUCT_TRAITS_MEMBER(main_frame_resizes_are_orientation_changes)
   IPC_STRUCT_TRAITS_MEMBER(initialize_at_minimum_page_scale)
   IPC_STRUCT_TRAITS_MEMBER(smart_insert_delete_enabled)
+  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)
diff --git content/public/common/web_preferences.cc content/public/common/web_preferences.cc
index 13999e87c780..3494c1c762cc 100644
--- content/public/common/web_preferences.cc
+++ content/public/common/web_preferences.cc
@@ -165,6 +165,7 @@ WebPreferences::WebPreferences()
       spatial_navigation_enabled(false),
       caret_browsing_enabled(false),
       navigate_on_drag_drop(true),
+      base_background_color(0xFFFFFFFF),  // Color::white
       v8_cache_options(blink::mojom::V8CacheOptions::kDefault),
       record_whole_document(false),
       cookie_enabled(true),
diff --git content/public/common/web_preferences.h content/public/common/web_preferences.h
index 6c6420ec70bf..256923855837 100644
--- content/public/common/web_preferences.h
+++ content/public/common/web_preferences.h
@@ -181,6 +181,7 @@ struct CONTENT_EXPORT WebPreferences {
   bool spatial_navigation_enabled;
   bool caret_browsing_enabled;
   bool navigate_on_drag_drop;
+  uint32_t base_background_color;
   blink::mojom::V8CacheOptions v8_cache_options;
   bool record_whole_document;
 
diff --git content/renderer/render_view_impl.cc content/renderer/render_view_impl.cc
index f0cb4833442b..1f80fefaa124 100644
--- content/renderer/render_view_impl.cc
+++ content/renderer/render_view_impl.cc
@@ -971,6 +971,8 @@ void RenderView::ApplyWebPreferences(const WebPreferences& prefs,
 #endif
 
   WebRuntimeFeatures::EnableTranslateService(prefs.translate_service_available);
+
+  web_view->SetBaseBackgroundColor(prefs.base_background_color);
 }
 
 /*static*/