WIP - compositor worker mega patch.

third_party/WebKit/public/platform/WebMutableProperties.h

+// 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 CompositorMutableProperties_h
+#define CompositorMutableProperties_h
+
+namespace blink {
+
+enum CompositorMutableProperty {
+    CompositorMutablePropertyNone = 0,
+    CompositorMutablePropertyOpacity = 1 << 0,
+    CompositorMutablePropertyScrollLeft = 1 << 1,
+    CompositorMutablePropertyScrollTop = 1 << 2,
+    CompositorMutablePropertyTransform = 1 << 3,
+};
+
+} // namespace blink
+
+#endif // CompositorMutableProperties_h