Revert of Catch up the spec update in CSS Rhythmic Sizing

third_party/WebKit/Source/core/css/resolver/StyleBuilderCustom.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
@@ skipping 408 matching lines @@
           // <page-size>
           pageSizeType = PAGE_SIZE_RESOLVED;
           size = getPageSizeFromName(ident);
       }
     }
   }
   state.style()->setPageSizeType(pageSizeType);
   state.style()->setPageSize(size);
 }
 
+void StyleBuilderFunctions::applyInitialCSSPropertySnapHeight(
+    StyleResolverState& state) {
+  state.style()->setSnapHeightUnit(0);
+  state.style()->setSnapHeightPosition(0);
+}
+
+void StyleBuilderFunctions::applyInheritCSSPropertySnapHeight(
+    StyleResolverState& state) {
+  state.style()->setSnapHeightUnit(state.parentStyle()->snapHeightUnit());
+  state.style()->setSnapHeightPosition(
+      state.parentStyle()->snapHeightPosition());
+}
+
+void StyleBuilderFunctions::applyValueCSSPropertySnapHeight(
+    StyleResolverState& state,
+    const CSSValue& value) {
+  const CSSValueList& list = toCSSValueList(value);
+  const CSSPrimitiveValue& first = toCSSPrimitiveValue(list.item(0));
+  DCHECK(first.isLength());
+  int unit = first.computeLength<int>(state.cssToLengthConversionData());
+  DCHECK_GE(unit, 0);
+  state.style()->setSnapHeightUnit(clampTo<uint8_t>(unit));
+
+  if (list.length() == 1) {
+    state.style()->setSnapHeightPosition(0);
+    return;
+  }
+
+  DCHECK_EQ(list.length(), 2U);
+  const CSSPrimitiveValue& second = toCSSPrimitiveValue(list.item(1));
+  DCHECK(second.isNumber());
+  int position = second.getIntValue();
+  DCHECK(position > 0 && position <= 100);
+  state.style()->setSnapHeightPosition(position);
+}
+
 void StyleBuilderFunctions::applyValueCSSPropertyTextAlign(
     StyleResolverState& state,
     const CSSValue& value) {
   if (value.isIdentifierValue() &&
       toCSSIdentifierValue(value).getValueID() != CSSValueWebkitMatchParent) {
     // Special case for th elements - UA stylesheet text-align does not apply if
     // parent's computed value for text-align is not its initial value
     // https://html.spec.whatwg.org/multipage/rendering.html#tables-2
     const CSSIdentifierValue& identValue = toCSSIdentifierValue(value);
     if (identValue.getValueID() == CSSValueInternalCenter &&
@@ skipping 553 matching lines @@
     state.style()->setCaretColor(
         StyleBuilderConverter::convertStyleAutoColor(state, value));
   }
   if (state.applyPropertyToVisitedLinkStyle()) {
     state.style()->setVisitedLinkCaretColor(
         StyleBuilderConverter::convertStyleAutoColor(state, value, true));
   }
 }
 
 }  // namespace blink