Prevent markContainerChainForLayout to scheduleRelayout() if isInPerformLayout()

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 0204a2614af5b3f66a06967dbaf95bdadfb5616a..3e228163af5bbd450bf04117bc34a1c6ab45f74c 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -752,10 +752,12 @@ void LayoutObject::markContainerChainForLayout(bool scheduleRelayout, SubtreeLay
 {
     ASSERT(!isSetNeedsLayoutForbidden());
     ASSERT(!layouter || this != layouter->root());
-    // When we have a layouter, it means that we're in layout and we're marking
-    // a descendant as needing layout with the intention of visiting it during
-    // this layout. We shouldn't be scheduling it to be laid out later.
-    ASSERT(!scheduleRelayout || !layouter);
+    // When we're in layout, we're marking a descendant as needing layout with
+    // the intention of visiting it during this layout. We shouldn't be
+    // scheduling it to be laid out later.
+    // Also, schedduleRelayout() must not be called while iterating

[cbiesinger, 2016/04/26 02:04:30]

scheddule -> schedule

+    // FrameView::m_layoutSubtreeRootList.
+    scheduleRelayout &= !frameView()->isInPerformLayout();
 
     LayoutObject* object = container();
     LayoutObject* last = this;