Updated to Chrome 45 (2454) moved from SVN to git.

core/dom/CompositorProxy.idl

+// Copyright 2015 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.
+
+[
+    Constructor(Element element, DOMString[] attributeArray),
+    ConstructorCallWith=ExecutionContext,
+    Exposed=(Window,CompositorWorker),
+    GarbageCollected,
+    RaisesException=Constructor,
+    RuntimeEnabled=CompositorWorker,
+] interface CompositorProxy {
+    [RaisesException] attribute double opacity;
+    [RaisesException] attribute double scrollLeft;
+    [RaisesException] attribute double scrollTop;
+    [RaisesException] attribute DOMMatrix transform;
+
+    boolean supports(DOMString attribute);
+    void disconnect();
+};