Revert of Add a FOUC painting test.

Source/web/tests/sim/SimDisplayItemList.cpp

-// 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.
-
-#include "config.h"
-#include "web/tests/sim/SimDisplayItemList.h"
-
-#include "third_party/skia/include/core/SkPicture.h"
-
-namespace blink {
-
-SimDisplayItemList::SimDisplayItemList()
-    : m_didDrawText(false)
-    , m_drawCount(0)
-{
-}
-
-void SimDisplayItemList::appendDrawingItem(const SkPicture* picture)
-{
-    // There's not much we can tell about a picture, but we can tell if it
-    // contains text. Ideally paint slimming would have a higher level
-    // display list (or special GraphicsContext) so unit tests could query
-    // what kind of things were painted.
-    m_didDrawText |= picture->hasText();
-    m_drawCount += picture->approximateOpCount();
-}
-
-} // namespace blink