Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/dom/StyleElement.cpp

Index: third_party/WebKit/Source/core/dom/StyleElement.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleElement.cpp b/third_party/WebKit/Source/core/dom/StyleElement.cpp
index 22f54058887bfb7bcd0ec787de00e013d728a910..6fc0bf7d01a33c0c3b804ed65b16b988dce8459c 100644
--- a/third_party/WebKit/Source/core/dom/StyleElement.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleElement.cpp
@@ -86,13 +86,11 @@ void StyleElement::removedFrom(Element& element,
     m_registeredAsCandidate = false;
   }
 
-  StyleSheet* removedSheet = m_sheet.get();
-
-  if (m_sheet)
+  if (m_sheet) {
     clearSheet(element);
-  if (removedSheet)
-    document.styleEngine().setNeedsActiveStyleUpdate(removedSheet,
-                                                     AnalyzedStyleUpdate);
+    if (element.isConnected())
+      document.styleEngine().setNeedsActiveStyleUpdate(element.treeScope());
+  }
 }
 
 StyleElement::ProcessingResult StyleElement::childrenChanged(Element& element) {