Added CSSPropertyAPI and CSS padding properties which implement this API

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

+// Copyright 2016 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/CSSPaddingProperties.h"
+
+#include "core/css/parser/CSSParserTokenRange.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIWebkitPaddingStart::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  return consumeLengthOrPercent(
+      range, context.mode(), ValueRangeNonNegative,
+      CSSPropertyParserHelpers::UnitlessQuirk::Forbid);
+}
+
+const CSSValue* CSSPropertyAPIWebkitPaddingEnd::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  return consumeLengthOrPercent(
+      range, context.mode(), ValueRangeNonNegative,
+      CSSPropertyParserHelpers::UnitlessQuirk::Forbid);
+}
+
+const CSSValue* CSSPropertyAPIWebkitPaddingBefore::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  return consumeLengthOrPercent(
+      range, context.mode(), ValueRangeNonNegative,
+      CSSPropertyParserHelpers::UnitlessQuirk::Forbid);
+}
+
+const CSSValue* CSSPropertyAPIWebkitPaddingAfter::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  return consumeLengthOrPercent(
+      range, context.mode(), ValueRangeNonNegative,
+      CSSPropertyParserHelpers::UnitlessQuirk::Forbid);
+}

[alancutter (OOO until 2018), 2016/11/30 23:46:54]

These implementations are identical, they should inherit from the one single
implementation.
Note that code deduplication can have instruction cache performance benefits.

[aazzam, 2016/12/01 04:17:53]

done

+
+}  // namespace blink