Re-land Catch up the spec update in CSS Rhythmic Sizing

third_party/WebKit/Source/core/css/BUILD.gn

Index: third_party/WebKit/Source/core/css/BUILD.gn
diff --git a/third_party/WebKit/Source/core/css/BUILD.gn b/third_party/WebKit/Source/core/css/BUILD.gn
index f2b7e7ebfb620b195dd60e03c2889485076f0a3d..985612e101167368ee364495d712e1ad1e636cf4 100644
--- a/third_party/WebKit/Source/core/css/BUILD.gn
+++ b/third_party/WebKit/Source/core/css/BUILD.gn
@@ -387,6 +387,7 @@ blink_core_sources("css") {
     "properties/CSSPropertyAPIImageOrientation.cpp",
     "properties/CSSPropertyAPIJustifyItems.cpp",
     "properties/CSSPropertyAPILetterAndWordSpacing.cpp",
+    "properties/CSSPropertyAPILineHeightStep.cpp",
     "properties/CSSPropertyAPIMargin.cpp",
     "properties/CSSPropertyAPIMarker.cpp",
     "properties/CSSPropertyAPIOffsetAnchor.cpp",
@@ -413,7 +414,6 @@ blink_core_sources("css") {
     "properties/CSSPropertyAPIShapeMargin.cpp",
     "properties/CSSPropertyAPIShapeOutside.cpp",
     "properties/CSSPropertyAPISize.cpp",
-    "properties/CSSPropertyAPISnapHeight.cpp",
     "properties/CSSPropertyAPIStrokeDasharray.cpp",
     "properties/CSSPropertyAPIStrokeMiterlimit.cpp",
     "properties/CSSPropertyAPIStrokeOrLength.cpp",