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

Source/core/layout/LayoutMultiColumnSpannerPlaceholder.cpp

 // 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.
 
 #include "config.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
 
 namespace blink {
 
 static void copyMarginProperties(LayoutStyle& placeholderStyle, const LayoutStyle& spannerStyle)
@@ skipping 73 matching lines @@
 }
 
 void LayoutMultiColumnSpannerPlaceholder::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
 {
     computedValues.m_extent = m_rendererInFlowThread->logicalHeight();
     computedValues.m_position = logicalTop;
     computedValues.m_margins.m_before = marginBefore();
     computedValues.m_margins.m_after = marginAfter();
 }
 
-void LayoutMultiColumnSpannerPlaceholder::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
+void LayoutMultiColumnSpannerPlaceholder::invalidateTreeIfNeeded(PaintInvalidationState& paintInvalidationState)
 {
     PaintInvalidationState newPaintInvalidationState(paintInvalidationState, *this, paintInvalidationState.paintInvalidationContainer());
     m_rendererInFlowThread->invalidateTreeIfNeeded(newPaintInvalidationState);
     LayoutBox::invalidateTreeIfNeeded(paintInvalidationState);
 }
 
 void LayoutMultiColumnSpannerPlaceholder::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (!m_rendererInFlowThread->hasSelfPaintingLayer())
         m_rendererInFlowThread->paint(paintInfo, paintOffset);
 }
 
 bool LayoutMultiColumnSpannerPlaceholder::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
 {
     return !m_rendererInFlowThread->hasSelfPaintingLayer() && m_rendererInFlowThread->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
 }
 
 }