Added CSSPropertyAPI and CSS padding properties which implement this API

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4aca20feac5262c3da86722855d0ec35942771d0
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.cpp
@@ -0,0 +1,47 @@
+// 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/CSSPropertyDescriptor.h"
+
+#include "core/CSSPropertyNames.h"
+#include "core/css/properties/CSSPaddingProperties.h"
+
+namespace blink {
+
+CSSPropertyDescriptor getInvalidDescriptor() {
+  CSSPropertyDescriptor a;
+  a.isValidProperty = false;
+  return a;
+}
+
+static CSSPropertyDescriptor cssPropertyDescriptors[800];

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

CSSPropertyNames.h -- kNumberOfProperties, MAX_PROPERTY_ID

+
+static void registerDescriptors() {

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

TODO(aazzam): generate this function

+  static bool isCalled = false;

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

comments explaining this and the loop underneath

+  if (isCalled)
+    return;
+  isCalled = true;
+  for (int i = 0; i < 800; i++) {
+    cssPropertyDescriptors[i] = getInvalidDescriptor();
+  }
+  add(getDescriptor<CSSPropertyAPIWebkitPaddingEnd>(),
+      CSSPropertyWebkitPaddingEnd);
+  add(getDescriptor<CSSPropertyAPIWebkitPaddingStart>(),
+      CSSPropertyWebkitPaddingStart);
+  add(getDescriptor<CSSPropertyAPIWebkitPaddingBefore>(),
+      CSSPropertyWebkitPaddingBefore);
+  add(getDescriptor<CSSPropertyAPIWebkitPaddingAfter>(),
+      CSSPropertyWebkitPaddingAfter);
+}
+
+const CSSPropertyDescriptor& get(CSSPropertyID id) {
+  registerDescriptors();
+

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

remove newline

+  return cssPropertyDescriptors[id];
+}
+
+void add(CSSPropertyDescriptor descriptor, CSSPropertyID id) {
+  cssPropertyDescriptors[id] = descriptor;

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

DCHECK(id > 0)
DCHECK(id <= kNumberOfProperties)

+}

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

add newline

+}