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

Source/core/layout/LayoutImage.cpp

Index: Source/core/layout/LayoutImage.cpp
diff --git a/Source/core/layout/LayoutImage.cpp b/Source/core/layout/LayoutImage.cpp
index 237c5aa70db2b5f54ce9f24aecacf901736ee274..d93280a590121c736797572bd0154ec2b1a3282f 100644
--- a/Source/core/layout/LayoutImage.cpp
+++ b/Source/core/layout/LayoutImage.cpp
@@ -39,7 +39,6 @@
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMapElement.h"
 #include "core/layout/HitTestResult.h"
-#include "core/layout/LayoutPart.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/PaintInfo.h"
 #include "core/layout/TextRunConstructor.h"
@@ -176,30 +175,6 @@
     contentChanged(ImageChanged);
 }
 
-bool LayoutImage::rectIntersectsVisibleViewport(const LayoutRect& localRect)
-{
-    LayoutRect rect = localRect;
-    LayoutView* layoutView = view();
-    while (layoutView->frame()->ownerLayoutObject())
-        layoutView = layoutView->frame()->ownerLayoutObject()->view();
-    mapRectToPaintInvalidationBacking(layoutView, rect, 0);
-    return rect.intersects(LayoutRect(layoutView->frameView()->visualViewportRect()));
-}
-
-PaintInvalidationReason LayoutImage::invalidatePaintIfNeeded(const PaintInvalidationState& paintInvalidationState, const LayoutBoxModelObject& paintInvalidationContainer)
-{
-    if (!RuntimeEnabledFeatures::slimmingPaintEnabled())
-        return LayoutReplaced::invalidatePaintIfNeeded(paintInvalidationState, paintInvalidationContainer);
-
-    if (!imageResource() || !imageResource()->image() || !imageResource()->image()->maybeAnimated()
-        || rectIntersectsVisibleViewport(visualOverflowRect())) {
-        return LayoutReplaced::invalidatePaintIfNeeded(paintInvalidationState, paintInvalidationContainer);
-    }
-
-    return PaintInvalidationDelayedFull;
-}
-
-
 void LayoutImage::notifyFinished(Resource* newImage)
 {
     if (!m_imageResource)