Revert of Catch up the spec update in CSS Rhythmic Sizing

third_party/WebKit/Source/core/css/properties/CSSPropertyAPISnapHeight.cpp

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPISnapHeight.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPISnapHeight.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPISnapHeight.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..11176acbd52b7777def1dce713dc75910d8ba93d
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPISnapHeight.cpp
@@ -0,0 +1,33 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/css/properties/CSSPropertyAPISnapHeight.h"
+
+#include "core/css/CSSValueList.h"
+#include "core/css/parser/CSSParserContext.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPISnapHeight::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context) {
+  CSSPrimitiveValue* unit = CSSPropertyParserHelpers::consumeLength(
+      range, context->mode(), ValueRangeNonNegative);
+  if (!unit)
+    return nullptr;
+  CSSValueList* list = CSSValueList::createSpaceSeparated();
+  list->append(*unit);
+
+  if (CSSPrimitiveValue* position =
+          CSSPropertyParserHelpers::consumePositiveInteger(range)) {
+    if (position->getIntValue() > 100)
+      return nullptr;
+    list->append(*position);
+  }
+
+  return list;
+}
+
+}  // namespace blink