Fix bug of animated table col/section/row background

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index f36b66cb19de939b00e1e070f36a93ac26ba091b..8078959bc4702a2b667680fcda1b765f864911c7 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -1685,10 +1685,12 @@ void LayoutBox::imageChanged(WrappedImagePtr image, const IntRect*) {
             layer->image()->cachedImage() &&
             layer->image()->cachedImage()->getImage() &&
             layer->image()->cachedImage()->getImage()->maybeAnimated();
-        if (maybeAnimated)
+        if (maybeAnimated) {
           setMayNeedPaintInvalidationAnimatedBackgroundImage();
-        else
+        } else {
           setShouldDoFullPaintInvalidation();
+          setBackgroundChangedSinceLastPaintInvalidation();
+        }
         break;
       }
     }
@@ -1755,6 +1757,27 @@ bool LayoutBox::intersectsVisibleViewport() const {
       layoutView->frameView()->getScrollableArea()->visibleContentRect()));
 }
 
+void LayoutBox::ensureIsReadyForPaintInvalidation() {
+  LayoutBoxModelObject::ensureIsReadyForPaintInvalidation();
+
+  if (mayNeedPaintInvalidationAnimatedBackgroundImage() &&
+      !backgroundIsKnownToBeObscured())
+    setShouldDoFullPaintInvalidation(PaintInvalidationDelayedFull);
+
+  if (fullPaintInvalidationReason() != PaintInvalidationDelayedFull ||
+      !intersectsVisibleViewport())
+    return;
+
+  // Do regular full paint invalidation if the object with
+  // PaintInvalidationDelayedFull is onscreen.
+  if (intersectsVisibleViewport()) {
+    // Conservatively assume the delayed paint invalidation was caused by
+    // background image change.
+    setBackgroundChangedSinceLastPaintInvalidation();
+    setShouldDoFullPaintInvalidation(PaintInvalidationFull);
+  }
+}
+
 PaintInvalidationReason LayoutBox::invalidatePaintIfNeeded(
     const PaintInvalidationState& paintInvalidationState) {
   if (hasBoxDecorationBackground()