Tweak PaintInvalidationReasons

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 384 matching lines @@
 
   // Fixed-position is painted using transform. In the case that the object
   // gets the same layout after changing position property, although no
   // re-raster (rect-based invalidation) is needed, display items should
   // still update their paint offset.
   if (old_style) {
     bool new_style_is_fixed_position =
         Style()->GetPosition() == EPosition::kFixed;
     bool old_style_is_fixed_position =
         old_style->GetPosition() == EPosition::kFixed;
-    if (new_style_is_fixed_position != old_style_is_fixed_position)
+    if (new_style_is_fixed_position != old_style_is_fixed_position) {
       ObjectPaintInvalidator(*this)
           .InvalidateDisplayItemClientsIncludingNonCompositingDescendants(
-              kPaintInvalidationStyleChange);
+              PaintInvalidationReason::kStyle);
+    }
   }
 
   // The used style for body background may change due to computed style change
   // on the document element because of background stealing.
   // Refer to backgroundStolenForBeingBody() and
   // http://www.w3.org/TR/css3-background/#body-background for more info.
   if (IsDocumentElement()) {
     HTMLBodyElement* body = GetDocument().FirstBodyElement();
     LayoutObject* body_layout = body ? body->GetLayoutObject() : nullptr;
     if (body_layout && body_layout->IsBoxModelObject()) {
@@ skipping 1062 matching lines @@
   if (root_element_style->HasBackground())
     return false;
 
   if (GetNode() != GetDocument().FirstBodyElement())
     return false;
 
   return true;
 }
 
 }  // namespace blink