Implements CSSPropertyAPI for the transform-origin property.

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPITransformOrigin.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPITransformOrigin.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPITransformOrigin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2079cab3011cbe26925700f4257f926835c8fbec
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPITransformOrigin.cpp
@@ -0,0 +1,36 @@
+// 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/CSSPropertyAPITransformOrigin.h"
+
+#include "core/css/CSSValueList.h"
+#include "core/css/parser/CSSParserContext.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPITransformOrigin::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  CSSValue* resultX = nullptr;
+  CSSValue* resultY = nullptr;
+  if (CSSPropertyParserHelpers::consumeOneOrTwoValuedPosition(
+          range, context.mode(),
+          CSSPropertyParserHelpers::UnitlessQuirk::Forbid, resultX, resultY)) {
+    CSSValueList* list = CSSValueList::createSpaceSeparated();
+    list->append(*resultX);
+    list->append(*resultY);
+    CSSValue* resultZ = CSSPropertyParserHelpers::consumeLength(
+        range, context.mode(), ValueRangeAll);
+    if (!resultZ) {
+      resultZ =
+          CSSPrimitiveValue::create(0, CSSPrimitiveValue::UnitType::Pixels);
+    }
+    list->append(*resultZ);
+    return list;
+  }
+  return nullptr;
+}
+
+}  // namespace blink