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

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 2b708e618d9e068aff2c17330d3002c2ceeb2c91..0fef167ba1c0eea8ff6341fe341ad3ea1e550fb3 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -1136,7 +1136,6 @@ void FrameView::invalidateTreeIfNeeded()
         invalidateRect(horizontalBarDamage());
     resetScrollbarDamage();
 
-
 #if ENABLE(ASSERT)
     layoutView()->assertSubtreeClearedPaintInvalidationState();
 #endif
@@ -1145,6 +1144,11 @@ void FrameView::invalidateTreeIfNeeded()
         m_frame->selection().invalidateCaretRect();
 }
 
+void FrameView::invalidatePaintForDelayedTargets()
+{
+    layoutView()->invalidatePaintForDelayedTargets();
+}
+
 DocumentLifecycle& FrameView::lifecycle() const
 {
     return m_frame->document()->lifecycle();
@@ -2618,6 +2622,14 @@ void FrameView::invalidateTreeIfNeededRecursive()
 
     m_doFullPaintInvalidation = false;
     lifecycle().advanceTo(DocumentLifecycle::PaintInvalidationClean);
+
+    layoutView()->invalidatePaintForDelayedTargets();
+    for (Frame* child = m_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
+        if (!child->isLocalFrame())
+            continue;
+
+        toLocalFrame(child)->view()->invalidatePaintForDelayedTargets();
+    }
 }
 
 void FrameView::enableAutoSizeMode(const IntSize& minSize, const IntSize& maxSize)