diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index c9dd677..f7af59a 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,5 +1,30 @@
 2018-04-24  Simon Fraser  <simon.fraser@apple.com>
 
+        visitedDependentColor() should take a CSSPropertyID
+        https://bugs.webkit.org/show_bug.cgi?id=184949
+
+        Reviewed by Sam Weinig.
+        
+        Change RenderStyle::colorIncludingFallback(), RenderStyle::visitedDependentColor()
+        and RenderElement::selectionColor() to take CSSPropertyID rather than int.
+
+        No behavior change.
+
+        * rendering/RenderElement.cpp:
+        (WebCore::RenderElement::selectionColor const):
+        * rendering/RenderElement.h:
+        * rendering/RenderTableCell.cpp:
+        (WebCore::RenderTableCell::computeCollapsedStartBorder const):
+        (WebCore::RenderTableCell::computeCollapsedEndBorder const):
+        (WebCore::RenderTableCell::computeCollapsedBeforeBorder const):
+        (WebCore::RenderTableCell::computeCollapsedAfterBorder const):
+        * rendering/style/RenderStyle.cpp:
+        (WebCore::RenderStyle::colorIncludingFallback const):
+        (WebCore::RenderStyle::visitedDependentColor const):
+        * rendering/style/RenderStyle.h:
+
+2018-04-24  Simon Fraser  <simon.fraser@apple.com>
+
         Add a new "color-filter" CSS property as an experimental feature
         https://bugs.webkit.org/show_bug.cgi?id=184940
         rdar://problem/39664904
diff --git a/Source/WebCore/rendering/RenderElement.cpp b/Source/WebCore/rendering/RenderElement.cpp
index 9427ed4..cf5ebbb 100644
--- a/Source/WebCore/rendering/RenderElement.cpp
+++ b/Source/WebCore/rendering/RenderElement.cpp
@@ -1356,7 +1356,7 @@
     return style;
 }
 
-Color RenderElement::selectionColor(int colorProperty) const
+Color RenderElement::selectionColor(CSSPropertyID colorProperty) const
 {
     // If the element is unselectable, or we are only painting the selection,
     // don't override the foreground color with the selection foreground color.
diff --git a/Source/WebCore/rendering/RenderElement.h b/Source/WebCore/rendering/RenderElement.h
index b53b3a4..41ed6a1 100644
--- a/Source/WebCore/rendering/RenderElement.h
+++ b/Source/WebCore/rendering/RenderElement.h
@@ -70,7 +70,7 @@
     bool canContainFixedPositionObjects() const;
     bool canContainAbsolutelyPositionedObjects() const;
 
-    Color selectionColor(int colorProperty) const;
+    Color selectionColor(CSSPropertyID) const;
     std::unique_ptr<RenderStyle> selectionPseudoStyle() const;
 
     // Obtains the selection colors that should be used when painting a selection.
diff --git a/Source/WebCore/rendering/RenderTableCell.cpp b/Source/WebCore/rendering/RenderTableCell.cpp
index 4d27504..218b4d1 100644
--- a/Source/WebCore/rendering/RenderTableCell.cpp
+++ b/Source/WebCore/rendering/RenderTableCell.cpp
@@ -558,8 +558,8 @@
 {
     // For the start border, we need to check, in order of precedence:
     // (1) Our start border.
-    int startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
-    int endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
+    CSSPropertyID startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
+    CSSPropertyID endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
     CollapsedBorderValue result(style().borderStart(), includeColor ? style().visitedDependentColor(startColorProperty) : Color(), BCELL);
 
     RenderTable* table = this->table();
@@ -669,8 +669,8 @@
 {
     // For end border, we need to check, in order of precedence:
     // (1) Our end border.
-    int startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
-    int endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
+    CSSPropertyID startColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderStartColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
+    CSSPropertyID endColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderEndColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
     CollapsedBorderValue result = CollapsedBorderValue(style().borderEnd(), includeColor ? style().visitedDependentColor(endColorProperty) : Color(), BCELL);
 
     RenderTable* table = this->table();
@@ -782,8 +782,8 @@
 {
     // For before border, we need to check, in order of precedence:
     // (1) Our before border.
-    int beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
-    int afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
+    CSSPropertyID beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
+    CSSPropertyID afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
     CollapsedBorderValue result = CollapsedBorderValue(style().borderBefore(), includeColor ? style().visitedDependentColor(beforeColorProperty) : Color(), BCELL);
     
     RenderTable* table = this->table();
@@ -879,8 +879,8 @@
 {
     // For after border, we need to check, in order of precedence:
     // (1) Our after border.
-    int beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
-    int afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : 0;
+    CSSPropertyID beforeColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderBeforeColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
+    CSSPropertyID afterColorProperty = includeColor ? CSSProperty::resolveDirectionAwareProperty(CSSPropertyWebkitBorderAfterColor, styleForCellFlow().direction(), styleForCellFlow().writingMode()) : CSSPropertyInvalid;
     CollapsedBorderValue result = CollapsedBorderValue(style().borderAfter(), includeColor ? style().visitedDependentColor(afterColorProperty) : Color(), BCELL);
     
     RenderTable* table = this->table();
diff --git a/Source/WebCore/rendering/style/RenderStyle.cpp b/Source/WebCore/rendering/style/RenderStyle.cpp
index 1ff3bdc..77bc455 100644
--- a/Source/WebCore/rendering/style/RenderStyle.cpp
+++ b/Source/WebCore/rendering/style/RenderStyle.cpp
@@ -1758,7 +1758,7 @@
     }
 }
 
-Color RenderStyle::colorIncludingFallback(int colorProperty, bool visitedLink) const
+Color RenderStyle::colorIncludingFallback(CSSPropertyID colorProperty, bool visitedLink) const
 {
     Color result;
     EBorderStyle borderStyle = BNONE;
@@ -1822,7 +1822,7 @@
     return result;
 }
 
-Color RenderStyle::visitedDependentColor(int colorProperty) const
+Color RenderStyle::visitedDependentColor(CSSPropertyID colorProperty) const
 {
     Color unvisitedColor = colorIncludingFallback(colorProperty, false);
     if (insideLink() != InsideVisitedLink)
diff --git a/Source/WebCore/rendering/style/RenderStyle.h b/Source/WebCore/rendering/style/RenderStyle.h
index 25d5a95..5d68577 100644
--- a/Source/WebCore/rendering/style/RenderStyle.h
+++ b/Source/WebCore/rendering/style/RenderStyle.h
@@ -1413,7 +1413,7 @@
     bool lastChildState() const { return m_nonInheritedFlags.lastChildState; }
     void setLastChildState() { setUnique(); m_nonInheritedFlags.lastChildState = true; }
 
-    WEBCORE_EXPORT Color visitedDependentColor(int colorProperty) const;
+    WEBCORE_EXPORT Color visitedDependentColor(CSSPropertyID) const;
     bool backgroundColorEqualsToColorIgnoringVisited(const Color& color) const { return color == backgroundColor(); }
 
     void setHasExplicitlyInheritedProperties() { m_nonInheritedFlags.hasExplicitlyInheritedProperties = true; }
@@ -1827,7 +1827,7 @@
     static bool isDisplayGridBox(EDisplay);
     static bool isDisplayFlexibleOrGridBox(EDisplay);
 
-    Color colorIncludingFallback(int colorProperty, bool visitedLink) const;
+    Color colorIncludingFallback(CSSPropertyID colorProperty, bool visitedLink) const;
 
     bool changeAffectsVisualOverflow(const RenderStyle&) const;
     bool changeRequiresLayout(const RenderStyle&, unsigned& changedContextSensitiveProperties) const;