Added CSSPropertyAPI and CSS padding properties which implement this API

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPI.h
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPI.h b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPI.h
new file mode 100644
index 0000000000000000000000000000000000000000..823948999d1d47b1273bd463611018b0eaabcd9e
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPI.h
@@ -0,0 +1,30 @@
+// 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 CSSPropertyAPI_h
+#define CSSPropertyAPI_h
+
+#include "core/CSSPropertyNames.h"
+#include "core/css/CSSValue.h"
+#include "core/css/parser/CSSParserMode.h"
+#include "core/css/parser/CSSParserTokenRange.h"
+
+namespace blink {
+
+class CSSPropertyAPI {

[aazzam, 2016/11/28 23:29:00]

Look at other public APIs -- twitter, facebook, google+, thetvdb

put a comment here

+ public:
+  static const CSSValue* parseSingleValue(CSSParserTokenRange&,
+                                          const CSSParserContext&) {
+    NOTREACHED();

[aazzam, 2016/11/28 23:29:00]

Try not implement these

+    return nullptr;
+  }
+
+  static inline CSSPropertyID getID() {
+    NOTREACHED();
+    return CSSPropertyInvalid;
+  }
+};
+}
+
+#endif  // CSSPropertyAPI_h