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

Source/core/page/PrintContextTest.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/page/PrintContext.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
@@ skipping 172 matching lines @@
     ASSERT_EQ(2u, operations.size());
     EXPECT_EQ(MockCanvas::DrawRect, operations[0].type);
     EXPECT_SKRECT_EQ(50, 60, 70, 80, operations[0].rect);
     EXPECT_EQ(MockCanvas::DrawRect, operations[1].type);
     EXPECT_SKRECT_EQ(150, 160, 170, 180, operations[1].rect);
     // We should also check if the annotation is correct but Skia doesn't export
     // SkAnnotation API.
 }
 
 class PrintContextTestWithSlimmingPaint : public PrintContextTest {
+public:
+    PrintContextTestWithSlimmingPaint()
+        : m_originalSlimmingPaintEnabled(RuntimeEnabledFeatures::slimmingPaintEnabled()) { }
+
 protected:
     virtual void SetUp() override
     {
         PrintContextTest::SetUp();
         RuntimeEnabledFeatures::setSlimmingPaintEnabled(true);
     }
     virtual void TearDown() override
     {
-        RuntimeEnabledFeatures::setSlimmingPaintEnabled(false);
+        RuntimeEnabledFeatures::setSlimmingPaintEnabled(m_originalSlimmingPaintEnabled);
         PrintContextTest::TearDown();
     }
+
+private:
+    bool m_originalSlimmingPaintEnabled;
 };
 
 TEST_F(PrintContextTest, LinkTarget)
 {
     testBasicLinkTarget();
 }
 
 TEST_F(PrintContextTestWithSlimmingPaint, LinkTargetBasic)
 {
     testBasicLinkTarget();
@@ skipping 155 matching lines @@
     EXPECT_SKRECT_EQ(150, 160, 170, 180, operations[1].rect);
     EXPECT_EQ(MockCanvas::DrawRect, operations[2].type);
     EXPECT_SKRECT_EQ(250, 260, 270, 280, operations[2].rect);
 
     subframe->detach();
     static_cast<SingleChildFrameLoaderClient*>(document().frame()->client())->setChild(nullptr);
     document().frame()->host()->decrementSubframeCount();
 }
 
 } // namespace blink