[S.P.] Don't draw frames of animated images that are offscreen

Source/core/layout/LayoutView.cpp

Index: Source/core/layout/LayoutView.cpp
diff --git a/Source/core/layout/LayoutView.cpp b/Source/core/layout/LayoutView.cpp
index 7f87c3f37ded9e2ceb5e6da05732c01b723063b2..58b372c77561b1e8f045bee28f3905eb48ce03d6 100644
--- a/Source/core/layout/LayoutView.cpp
+++ b/Source/core/layout/LayoutView.cpp
@@ -342,6 +342,13 @@ void LayoutView::invalidateTreeIfNeeded(const PaintInvalidationState& paintInval
     LayoutBlock::invalidateTreeIfNeeded(paintInvalidationState);
 }
 
+void LayoutView::invalidatePaintForDelayedTargets()
+{
+    for (auto& target : m_pendingDelayedPaintInvalidations)
+        target->setShouldDoFullPaintInvalidation(PaintInvalidationDelayedFull);
+    m_pendingDelayedPaintInvalidations.clear();
+}
+
 void LayoutView::invalidatePaintForRectangle(const LayoutRect& paintInvalidationRect, PaintInvalidationReason invalidationReason) const
 {
     ASSERT(!paintInvalidationRect.isEmpty());