Throttle rendering pipeline for invisible iframes

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

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index 80565df0ef762904c649c481e51d244adfde82f2..61313bde290021e1e56ca0fafacd2286727a4194 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -3174,7 +3174,8 @@ void LayoutObject::setShouldDoFullPaintInvalidation(PaintInvalidationReason reas
 
     if (!isUpgradingDelayedFullToFull) {
         ASSERT(document().lifecycle().state() != DocumentLifecycle::InPaintInvalidation);
-        frame()->page()->animator().scheduleVisualUpdate(); // In case that this is called outside of FrameView::updateLayoutAndStyleForPainting().
+        if (!frameView() || !frameView()->shouldThrottleRenderingPipeline())
+            frame()->page()->animator().scheduleVisualUpdate(); // In case that this is called outside of FrameView::updateLayoutAndStyleForPainting().
         markContainerChainForPaintInvalidation();
     }
 }
@@ -3185,7 +3186,8 @@ void LayoutObject::setMayNeedPaintInvalidation()
         return;
     m_bitfields.setMayNeedPaintInvalidation(true);
     markContainerChainForPaintInvalidation();
-    frame()->page()->animator().scheduleVisualUpdate(); // In case that this is called outside of FrameView::updateLayoutAndStyleForPainting().
+    if (!frameView() || !frameView()->shouldThrottleRenderingPipeline())
+        frame()->page()->animator().scheduleVisualUpdate(); // In case that this is called outside of FrameView::updateLayoutAndStyleForPainting().
 }
 
 void LayoutObject::clearPaintInvalidationState(const PaintInvalidationState& paintInvalidationState)