[SP] Save and restore slimming paint enabled state in SP-specific unit tests.

Source/core/paint/DisplayItemListPaintTest.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 "platform/graphics/paint/DisplayItemList.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutText.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/line/InlineTextBox.h"
 #include "core/page/FocusController.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "core/paint/DeprecatedPaintLayerPainter.h"
 #include "core/paint/LayerClipRecorder.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/ScopeRecorder.h"
 #include "core/paint/SubtreeRecorder.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 class DisplayItemListPaintTest : public RenderingTest {
 public:
     DisplayItemListPaintTest()
-        : m_layoutView(nullptr) { }
+        : m_layoutView(nullptr)
+        , m_originalSlimmingPaintEnabled(RuntimeEnabledFeatures::slimmingPaintEnabled()) { }
 
 protected:
     LayoutView& layoutView() { return *m_layoutView; }
     DisplayItemList& rootDisplayItemList() { return *layoutView().layer()->graphicsLayerBacking()->displayItemList(); }
     const DisplayItems& newPaintListBeforeUpdate() { return rootDisplayItemList().m_newDisplayItems; }
 
 private:
     virtual void SetUp() override
     {
         RuntimeEnabledFeatures::setSlimmingPaintEnabled(true);
 
         RenderingTest::SetUp();
         enableCompositing();
 
         m_layoutView = document().view()->layoutView();
         ASSERT_TRUE(m_layoutView);
     }
 
     virtual void TearDown() override
     {
-        RuntimeEnabledFeatures::setSlimmingPaintEnabled(false);
+        RuntimeEnabledFeatures::setSlimmingPaintEnabled(m_originalSlimmingPaintEnabled);
     }
 
     LayoutView* m_layoutView;
+    bool m_originalSlimmingPaintEnabled;
 };
 
 class TestDisplayItem : public DisplayItem {
 public:
     TestDisplayItem(const DisplayItemClientWrapper& client, Type type) : DisplayItem(client, type) { }
 
     virtual void replay(GraphicsContext&) override final { ASSERT_NOT_REACHED(); }
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override final { ASSERT_NOT_REACHED(); }
 };
 
@@ skipping 86 matching lines @@
     InlineTextBox& newFirstTextBox = *newText.firstTextBox();
     InlineTextBox& secondTextBox = *newText.firstTextBox()->nextTextBox();
 
     EXPECT_DISPLAY_LIST(rootDisplayItemList().displayItems(), 3,
         TestDisplayItem(htmlObject, DisplayItem::BoxDecorationBackground),
         TestDisplayItem(newFirstTextBox, DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)),
         TestDisplayItem(secondTextBox, DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)));
 }
 
 } // namespace blink