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

Source/core/paint/LayerClipRecorderTest.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/paint/LayerClipRecorder.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 namespace {
 
 class LayerClipRecorderTest : public RenderingTest {
 public:
-    LayerClipRecorderTest() : m_layoutView(nullptr) { }
+    LayerClipRecorderTest()
+        : m_layoutView(nullptr)
+        , m_originalSlimmingPaintEnabled(RuntimeEnabledFeatures::slimmingPaintEnabled()) { }
 
 protected:
     LayoutView& layoutView() { return *m_layoutView; }
     DisplayItemList& rootDisplayItemList() { return *layoutView().layer()->graphicsLayerBacking()->displayItemList(); }
 
 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(m_originalSlimmingPaintEnabled);
+    }
 
     LayoutView* m_layoutView;
+    bool m_originalSlimmingPaintEnabled;
 };
 
 void drawEmptyClip(GraphicsContext& context, LayoutView& layoutView, PaintPhase phase, const FloatRect& bound)
 {
     LayoutRect rect(1, 1, 9, 9);
     ClipRect clipRect(rect);
     LayerClipRecorder LayerClipRecorder(context, *layoutView.compositor()->rootLayer()->layoutObject(), DisplayItem::ClipLayerForeground, clipRect, 0, LayoutPoint(), PaintLayerFlags());
 }
 
 void drawRectInClip(GraphicsContext& context, LayoutView& layoutView, PaintPhase phase, const FloatRect& bound)
@@ skipping 26 matching lines @@
     FloatRect bound = layoutView().viewRect();
     EXPECT_EQ((size_t)0, rootDisplayItemList().displayItems().size());
 
     drawEmptyClip(context, layoutView(), PaintPhaseForeground, bound);
     rootDisplayItemList().commitNewDisplayItems();
     EXPECT_EQ((size_t)0, rootDisplayItemList().displayItems().size());
 }
 
 }
 }