Added CSSPropertyAPI and CSS padding properties which implement this API

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

Index: third_party/WebKit/Source/core/css/properties/CSSPaddingProperties.h
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPaddingProperties.h b/third_party/WebKit/Source/core/css/properties/CSSPaddingProperties.h
new file mode 100644
index 0000000000000000000000000000000000000000..a4f9bb8e4393e087b752acf0b678fae6f3ab5cad
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPaddingProperties.h
@@ -0,0 +1,55 @@
+// 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.
+
+#ifndef CSSPaddingProperties_h
+#define CSSPaddingProperties_h
+
+#include "core/CSSPropertyNames.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+#include "core/css/properties/CSSPropertyAPI.h"
+#include "platform/Length.h"
+
+namespace blink {
+
+class CSSParserTokenRange;
+
+class CSSPropertyAPIWebkitPaddingStart : public CSSPropertyAPI {
+  STATIC_ONLY(CSSPropertyAPIWebkitPaddingStart);
+
+ public:
+  static const CSSValue* parseSingleValue(CSSParserTokenRange&,
+                                          const CSSParserContext&);
+  static inline CSSPropertyID getID() { return CSSPropertyWebkitPaddingStart; }
+};
+
+class CSSPropertyAPIWebkitPaddingEnd : public CSSPropertyAPI {
+  STATIC_ONLY(CSSPropertyAPIWebkitPaddingEnd);
+
+ public:
+  static const CSSValue* parseSingleValue(CSSParserTokenRange&,
+                                          const CSSParserContext&);
+  static inline CSSPropertyID getID() { return CSSPropertyWebkitPaddingEnd; }
+};
+
+class CSSPropertyAPIWebkitPaddingBefore : public CSSPropertyAPI {
+  STATIC_ONLY(CSSPropertyAPIWebkitPaddingBefore);
+
+ public:
+  static const CSSValue* parseSingleValue(CSSParserTokenRange&,
+                                          const CSSParserContext&);
+  static inline CSSPropertyID getID() { return CSSPropertyWebkitPaddingBefore; }
+};
+
+class CSSPropertyAPIWebkitPaddingAfter : public CSSPropertyAPI {
+  STATIC_ONLY(CSSPropertyAPIWebkitPaddingAfter);
+
+ public:
+  static const CSSValue* parseSingleValue(CSSParserTokenRange&,
+                                          const CSSParserContext&);
+  static inline CSSPropertyID getID() { return CSSPropertyWebkitPaddingAfter; }
+};
+
+}  // namespace blink
+
+#endif  // CSSPaddingProperties_h