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

Source/core/layout/LayoutMultiColumnSpannerPlaceholder.h

 // 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.
 
 #ifndef LayoutMultiColumnSpannerPlaceholder_h
 #define LayoutMultiColumnSpannerPlaceholder_h
 
 #include "core/layout/LayoutMultiColumnFlowThread.h"
 
 namespace blink {
@@ skipping 15 matching lines @@
 
     virtual const char* name() const override { return "LayoutMultiColumnSpannerPlaceholder"; }
 
 protected:
     virtual void willBeRemovedFromTree() override;
     virtual bool needsPreferredWidthsRecalculation() const override;
     virtual LayoutUnit minPreferredLogicalWidth() const override;
     virtual LayoutUnit maxPreferredLogicalWidth() const override;
     virtual void layout() override;
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
-    virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
+    virtual void invalidateTreeIfNeeded(PaintInvalidationState&) override;
     virtual void paint(const PaintInfo&, const LayoutPoint& paintOffset) override;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
 private:
     LayoutMultiColumnSpannerPlaceholder(LayoutBox*);
 
     LayoutBox* m_rendererInFlowThread; // The actual column-span:all renderer inside the flow thread.
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMultiColumnSpannerPlaceholder, isLayoutMultiColumnSpannerPlaceholder());
 
 } // namespace blink
 
 #endif