Revert "Move ViewDisplayList to GraphicsLayer"

Source/core/rendering/RenderingTestHelper.cpp

-// Copyright 2014 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 "core/rendering/RenderingTestHelper.h"
-
-#include "core/loader/EmptyClients.h"
-#include "platform/graphics/GraphicsLayer.h"
-#include "platform/graphics/GraphicsLayerFactory.h"
-
-namespace blink {
-
-class FakeGraphicsLayerFactory : public GraphicsLayerFactory {
-public:
-    virtual PassOwnPtr<GraphicsLayer> createGraphicsLayer(GraphicsLayerClient* client) override
-    {
-        return adoptPtr(new GraphicsLayer(client));
-    }
-};
-
-class FakeChromeClient : public EmptyChromeClient {
-public:
-    virtual GraphicsLayerFactory* graphicsLayerFactory() const
-    {
-        static FakeGraphicsLayerFactory* factory = adoptPtr(new FakeGraphicsLayerFactory).leakPtr();
-        return factory;
-    }
-};
-
-void RenderingTest::SetUp()
-{
-    fillWithEmptyClients(m_pageClients);
-    static FakeChromeClient* chromeClient = adoptPtr(new FakeChromeClient).leakPtr();
-    m_pageClients.chromeClient = chromeClient;
-    m_pageHolder = DummyPageHolder::create(IntSize(800, 600), &m_pageClients);
-
-    document().settings()->setRegionBasedColumnsEnabled(true);
-
-    // This ensures that the minimal DOM tree gets attached
-    // correctly for tests that don't call setBodyInnerHTML.
-    document().view()->updateLayoutAndStyleIfNeededRecursive();
-}
-
-
-} // namespace blink