Remove support for -webkit-line-clamp

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index ba075145bf0e8f9e6743dc8d587b2373346962eb..45e688627e9f96910632066fc2712a2cb1d208d4 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -283,7 +283,6 @@ static const CSSPropertyID staticComputableProperties[] = {
     CSSPropertyWebkitLineAlign,
     CSSPropertyWebkitLineBoxContain,
     CSSPropertyWebkitLineBreak,
-    CSSPropertyWebkitLineClamp,
     CSSPropertyWebkitLineGrid,
     CSSPropertyWebkitLineSnap,
     CSSPropertyWebkitLocale,
@@ -2101,10 +2100,6 @@ PassRefPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValue(CSSPropert
             if (!style->letterSpacing())
                 return cssValuePool().createIdentifierValue(CSSValueNormal);
             return zoomAdjustedPixelValue(style->letterSpacing(), style.get());
-        case CSSPropertyWebkitLineClamp:
-            if (style->lineClamp().isNone())
-                return cssValuePool().createIdentifierValue(CSSValueNone);
-            return cssValuePool().createValue(style->lineClamp().value(), style->lineClamp().isPercentage() ? CSSPrimitiveValue::CSS_PERCENTAGE : CSSPrimitiveValue::CSS_NUMBER);
         case CSSPropertyLineHeight:
             return valueForLineHeight(style.get(), m_node->document().renderView());
         case CSSPropertyListStyleImage: