Revert of Add a FOUC painting test.

Source/web/tests/sim/SimLayerTreeView.h

 // 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.
 
 #ifndef SimLayerTreeView_h
 #define SimLayerTreeView_h
 
 #include "public/platform/WebLayerTreeView.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
-class SimLayerTreeView final : public WebLayerTreeView {
+class SimLayerTreeView : public WebLayerTreeView {
 public:
     SimLayerTreeView();
 
     void setNeedsAnimate() override { m_needsAnimate = true; }
+    void clearNeedsAnimate() { m_needsAnimate = false; }
     bool needsAnimate() const { return m_needsAnimate; }
-    void clearNeedsAnimate() { m_needsAnimate = false; }
 
     void setDeferCommits(bool deferCommits) override { m_deferCommits = deferCommits; }
     bool deferCommits() const { return m_deferCommits; }
 
 private:
     bool m_needsAnimate;
     bool m_deferCommits;
 };
 
 } // namespace blink
 
 #endif