[SPv2] Don't paint invisible PaintLayers with transform animations.

third_party/WebKit/Source/core/paint/PaintLayerPainterTest.cpp

 // Copyright 2015 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 "core/paint/PaintLayerPainter.h"
 
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/compositing/CompositedLayerMapping.h"
 #include "core/paint/PaintControllerPaintTest.h"
 #include "platform/graphics/GraphicsContext.h"
@@ skipping 1065 matching lines @@
       "</style> "
       "<div id='target'></div>");
   PaintLayer* targetLayer =
       toLayoutBox(getLayoutObjectByElementId("target"))->layer();
   PaintLayerPaintingInfo paintingInfo(nullptr, LayoutRect(),
                                       GlobalPaintNormalPhase, LayoutSize());
   EXPECT_FALSE(
       PaintLayerPainter(*targetLayer).paintedOutputInvisible(paintingInfo));
 }
 
-TEST_P(PaintLayerPainterTest, DoPaintWithTransformAnimationZeroOpacity) {
+TEST_P(PaintLayerPainterTest, DoNotPaintWithTransformAnimationZeroOpacity) {
   setBodyInnerHTML(
       "<style> "
       "div#target { "
       "  animation-name: example; "
       "  animation-duration: 4s; "
       "  opacity: 0.0; "
       "} "
       "@keyframes example { "
       " from { transform: translate(0px, 0px); } "
       " to { transform: translate(3em, 0px); } "
       "} "
       "</style> "
       "<div id='target'>x</div></div>");
   PaintLayer* targetLayer =
       toLayoutBox(getLayoutObjectByElementId("target"))->layer();
   PaintLayerPaintingInfo paintingInfo(nullptr, LayoutRect(),
                                       GlobalPaintNormalPhase, LayoutSize());
-  EXPECT_FALSE(
-      PaintLayerPainter(*targetLayer).paintedOutputInvisible(paintingInfo));
+  if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
+    EXPECT_TRUE(
+        PaintLayerPainter(*targetLayer).paintedOutputInvisible(paintingInfo));
+  } else {
+    EXPECT_FALSE(
+        PaintLayerPainter(*targetLayer).paintedOutputInvisible(paintingInfo));
+  }
 }
 
 }  // namespace blink