Revert of Use element id's for animations

third_party/WebKit/Source/platform/graphics/CompositorElementId.cpp

Index: third_party/WebKit/Source/platform/graphics/CompositorElementId.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorElementId.cpp b/third_party/WebKit/Source/platform/graphics/CompositorElementId.cpp
deleted file mode 100644
index a86835a42fe81214ed3c4f52744e3e8e04941b90..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/graphics/CompositorElementId.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-// 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 "platform/graphics/CompositorElementId.h"
-
-namespace blink {
-
-CompositorElementId createCompositorElementId(int domNodeId, CompositorSubElementId subElementId)
-{
-    return CompositorElementId(domNodeId, static_cast<int>(subElementId));
-}
-
-} // namespace blink