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

Source/core/paint/LayoutObjectDrawingRecorderTest.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/LayoutObjectDrawingRecorder.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 class LayoutObjectDrawingRecorderTest : public RenderingTest {
 public:
-    LayoutObjectDrawingRecorderTest() : m_layoutView(nullptr) { }
+    LayoutObjectDrawingRecorderTest()
+        : m_layoutView(nullptr)
+        , m_originalSlimmingPaintEnabled(RuntimeEnabledFeatures::slimmingPaintEnabled()) { }
 
 protected:
     LayoutView& layoutView() { return *m_layoutView; }
     DisplayItemList& rootDisplayItemList() { return *layoutView().layer()->graphicsLayerBacking()->displayItemList(); }
     const DisplayItems& newDisplayItemsBeforeUpdate() { 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;
 };
 
 namespace {
 
 void drawNothing(GraphicsContext& context, const LayoutView& layoutView, PaintPhase phase, const FloatRect& bound)
 {
     LayoutObjectDrawingRecorder drawingRecorder(context, layoutView, phase, bound);
 
     // Redundant when there's nothing to draw but we must always do this check.
     if (drawingRecorder.canUseCachedDrawing())
@@ skipping 60 matching lines @@
     EXPECT_TRUE(isCached(newDisplayItemsBeforeUpdate()[0]));
     EXPECT_TRUE(isCached(newDisplayItemsBeforeUpdate()[1]));
     rootDisplayItemList().commitNewDisplayItems();
     EXPECT_EQ((size_t)2, rootDisplayItemList().displayItems().size());
     EXPECT_TRUE(isDrawing(rootDisplayItemList().displayItems()[0]));
     EXPECT_TRUE(isDrawing(rootDisplayItemList().displayItems()[1]));
 }
 
 } // namespace
 } // namespace blink