Implements CSSPropertyAPI for letter and word spacing

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

+// 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/CSSPropertyAPILetterAndWordSpacing.h"
+
+#include "core/css/parser/CSSParserContext.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPILetterAndWordSpacing::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext* context) {
+  if (range.peek().id() == CSSValueNormal)
+    return CSSPropertyParserHelpers::consumeIdent(range);
+  // TODO(timloh): allow <percentage>s in word-spacing.
+  return CSSPropertyParserHelpers::consumeLength(
+      range, context->mode(), ValueRangeAll,
+      CSSPropertyParserHelpers::UnitlessQuirk::Allow);
+}
+
+}  // namespace blink