Implements CSSPropertyAPI for the rotate property.

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

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyAPIRotate.cpp
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIRotate.cpp b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIRotate.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b163f5bc43849afa45418272718f884bb09b4a59
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyAPIRotate.cpp
@@ -0,0 +1,38 @@
+// 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/CSSPropertyAPIRotate.h"
+
+#include "core/css/CSSValueList.h"
+#include "core/css/parser/CSSPropertyParserHelpers.h"
+#include "platform/RuntimeEnabledFeatures.h"
+
+namespace blink {
+
+const CSSValue* CSSPropertyAPIRotate::parseSingleValue(
+    CSSParserTokenRange& range,
+    const CSSParserContext& context) {
+  DCHECK(RuntimeEnabledFeatures::cssIndependentTransformPropertiesEnabled());
+  CSSValueList* list = CSSValueList::createSpaceSeparated();
+
+  for (unsigned i = 0; i < 3; i++) {  // 3 dimensions of rotation
+    CSSValue* dimension =
+        CSSPropertyParserHelpers::consumeNumber(range, ValueRangeAll);
+    if (!dimension) {
+      if (i == 0)
+        break;
+      return nullptr;
+    }
+    list->append(*dimension);
+  }
+
+  CSSValue* rotation = CSSPropertyParserHelpers::consumeAngle(range);
+  if (!rotation)
+    return nullptr;
+  list->append(*rotation);
+
+  return list;
+}
+
+}  // namespace blink