[SPv2] Fix layout test crashes about raster invalidation

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 3726 matching lines @@
   for (Frame* frame = &frame_->Tree().Top(); frame;
        frame = frame->Tree().TraverseNext()) {
     if (!frame->IsLocalFrame())
       continue;
     if (LayoutViewItem layout_view = ToLocalFrame(frame)->ContentLayoutItem()) {
       layout_view.GetFrameView()->tracked_object_paint_invalidations_ =
           WTF::WrapUnique(track_paint_invalidations
                               ? new Vector<ObjectPaintInvalidation>
                               : nullptr);
       if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
+        if (!paint_controller_)
+          paint_controller_ = PaintController::Create();
         paint_controller_->SetTracksRasterInvalidations(
             track_paint_invalidations);
-        paint_artifact_compositor_->SetTracksRasterInvalidations(
-            track_paint_invalidations);
+        if (paint_artifact_compositor_)
+          paint_artifact_compositor_->ResetTrackedRasterInvalidations();
       } else {
         layout_view.Compositor()->SetTracksRasterInvalidations(
             track_paint_invalidations);
       }
     }
   }
 
   TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"),
                        "FrameView::setTracksPaintInvalidations",
                        TRACE_EVENT_SCOPE_GLOBAL, "enabled",
@@ skipping 1627 matching lines @@
 void FrameView::SetAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   animation_host_ = std::move(host);
 }
 
 LayoutUnit FrameView::CaretWidth() const {
   return LayoutUnit(GetChromeClient()->WindowToViewportScalar(1));
 }
 
 }  // namespace blink