Throttle rendering pipeline for invisible iframes

Source/core/paint/DisplayItemListPaintTest.cpp

Index: Source/core/paint/DisplayItemListPaintTest.cpp
diff --git a/Source/core/paint/DisplayItemListPaintTest.cpp b/Source/core/paint/DisplayItemListPaintTest.cpp
index f9fed44c8dc0e8f30525dcc4d6b8d718d643e2db..64c211dec71f378983a40d8813ababfd54259fa1 100644
--- a/Source/core/paint/DisplayItemListPaintTest.cpp
+++ b/Source/core/paint/DisplayItemListPaintTest.cpp
@@ -70,7 +70,7 @@ protected:
     // Expose some document lifecycle steps for checking new display items before commiting.
     void updateLifecyclePhasesToPaintForSlimmingPaintV2Clean()
     {
-        document().view()->updateLifecyclePhasesInternal(FrameView::OnlyUpToCompositingCleanPlusScrolling);
+        document().view()->updateLifecyclePhasesInternal(FrameView::OnlyUpToCompositingCleanPlusScrolling, DocumentLifecycle::ThrottlingMode::Disallow);
         document().view()->invalidateTreeIfNeededRecursive();
         document().view()->paintForSlimmingPaintV2();
     }