Optimize offscreen animation: don't update paint properties/visual rects

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

 // Copyright 2016 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/PaintInvalidator.h"
 
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 488 matching lines @@
       context.NeedsVisualRectUpdate(object)) {
     // If any subtree flag is set, we also need to pass needsVisualRectUpdate
     // requirement to the subtree.
     context.forced_subtree_invalidation_flags |=
         PaintInvalidatorContext::kForcedSubtreeVisualRectUpdate;
   }
 }
 
 void PaintInvalidator::ProcessPendingDelayedPaintInvalidations() {
   for (auto target : pending_delayed_paint_invalidations_) {
-    target->GetMutableForPainting().SetShouldDoFullPaintInvalidation(
-        kPaintInvalidationDelayedFull);
+    target->GetMutableForPainting()
+        .SetShouldDoFullPaintInvalidationWithoutGeometryChange(
+            kPaintInvalidationDelayedFull);
   }
 }
 
 }  // namespace blink