Add support for multiple text decorations with same line positioning

Source/core/css/resolver/StyleAdjuster.cpp

Index: Source/core/css/resolver/StyleAdjuster.cpp
diff --git a/Source/core/css/resolver/StyleAdjuster.cpp b/Source/core/css/resolver/StyleAdjuster.cpp
index cffe90e1a6a699f5bde5aa09d48f237edde15443..1cc1662e59089f0237f0da0d4024797a258a5d1d 100644
--- a/Source/core/css/resolver/StyleAdjuster.cpp
+++ b/Source/core/css/resolver/StyleAdjuster.cpp
@@ -111,7 +111,14 @@ static bool doesNotInheritTextDecoration(const ComputedStyle& style, const Eleme
 {
     return style.display() == INLINE_TABLE
         || style.display() == INLINE_BLOCK || style.display() == INLINE_BOX || isAtShadowBoundary(e)
-        || style.isFloating() || style.hasOutOfFlowPosition() || isOutermostSVGElement(e);
+        || style.isFloating() || style.hasOutOfFlowPosition() || isOutermostSVGElement(e)
+        || isHTMLRTElement(e);
+}
+
+// Certain elements (<a>, <font>) bind strongly to text decoration colors, for legacy reasons.
+static bool overridesTextDecorationColors(const Element* e)
+{
+    return e && (isHTMLFontElement(e) || isHTMLAnchorElement(e));
 }
 
 // FIXME: This helper is only needed because pseudoStyleForElement passes a null
@@ -204,8 +211,7 @@ void StyleAdjuster::adjustComputedStyle(ComputedStyle& style, const ComputedStyl
 
     if (doesNotInheritTextDecoration(style, e))
         style.clearAppliedTextDecorations();
-
-    style.applyTextDecorations();
+    style.applyTextDecorations(overridesTextDecorationColors(e));
 
     if (style.overflowX() != OVISIBLE || style.overflowY() != OVISIBLE)
         adjustOverflow(style);