Remove support for -webkit-line-clamp

Source/core/rendering/style/StyleRareNonInheritedData.cpp

Index: Source/core/rendering/style/StyleRareNonInheritedData.cpp
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.cpp b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
index c97f2f9d8bdc2560c773475c9bae64163a41afd9..4a581d15292c8f414e44d4a183709d498c8178bc 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.cpp
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
@@ -37,7 +37,6 @@ StyleRareNonInheritedData::StyleRareNonInheritedData()
     , m_perspective(RenderStyle::initialPerspective())
     , m_perspectiveOriginX(RenderStyle::initialPerspectiveOriginX())
     , m_perspectiveOriginY(RenderStyle::initialPerspectiveOriginY())
-    , lineClamp(RenderStyle::initialLineClamp())
     , m_draggableRegionMode(DraggableRegionNone)
     , m_mask(FillLayer(MaskFillLayer))
     , m_pageSize()
@@ -91,7 +90,6 @@ StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonInherited
     , m_perspective(o.m_perspective)
     , m_perspectiveOriginX(o.m_perspectiveOriginX)
     , m_perspectiveOriginY(o.m_perspectiveOriginY)
-    , lineClamp(o.lineClamp)
     , m_draggableRegionMode(o.m_draggableRegionMode)
     , m_deprecatedFlexibleBox(o.m_deprecatedFlexibleBox)
     , m_flexibleBox(o.m_flexibleBox)
@@ -170,7 +168,6 @@ bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c
         && m_perspective == o.m_perspective
         && m_perspectiveOriginX == o.m_perspectiveOriginX
         && m_perspectiveOriginY == o.m_perspectiveOriginY
-        && lineClamp == o.lineClamp
         && m_draggableRegionMode == o.m_draggableRegionMode
         && m_deprecatedFlexibleBox == o.m_deprecatedFlexibleBox
         && m_flexibleBox == o.m_flexibleBox