[css-ui] Add support for caret-color property

third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
@@ skipping 74 matching lines @@
 
 namespace {
 
 static inline bool isValidVisitedLinkProperty(CSSPropertyID id) {
   switch (id) {
     case CSSPropertyBackgroundColor:
     case CSSPropertyBorderLeftColor:
     case CSSPropertyBorderRightColor:
     case CSSPropertyBorderTopColor:
     case CSSPropertyBorderBottomColor:
+    case CSSPropertyCaretColor:

[Timothy Loh, 2016/11/22 02:17:35]

Do we need to do this? What are the use cases for styling caret-color
differently for visited and unvisited links? I think it'd be better to not
consider caret-color specially for :visited. Otherwise we'd need to add tests
for this behaviour.

[Manuel Rego, 2016/11/22 09:36:01]

We actually have a test for this specific behavior:
  editing/caret/caret-color-015.html

The tests were validated by Florian Rivoal (the spec editor)
so I believe we really want to support this.

Authors usually modify the color of the link if it's visited,
if the link is editable it'd be nice to have a different caret-color too.

     case CSSPropertyColor:
     case CSSPropertyFill:
     case CSSPropertyOutlineColor:
     case CSSPropertyStroke:
     case CSSPropertyTextDecorationColor:
     case CSSPropertyColumnRuleColor:
     case CSSPropertyWebkitTextEmphasisColor:
     case CSSPropertyWebkitTextFillColor:
     case CSSPropertyWebkitTextStrokeColor:
       return true;
@@ skipping 930 matching lines @@
   }
 }
 
 void StyleBuilderFunctions::applyInheritCSSPropertyPosition(
     StyleResolverState& state) {
   if (!state.parentNode()->isDocumentNode())
     state.style()->setPosition(state.parentStyle()->position());
 }
 
 }  // namespace blink