Collect active stylesheets and and apply asynchronously.

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

Index: third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.cpp
diff --git a/third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.cpp b/third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.cpp
index 7a0325253faff78225c9027ea568dcbdd1674167..17abbb9dc966195e73d4a7421de5e399e11dddfd 100644
--- a/third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.cpp
+++ b/third_party/WebKit/Source/core/dom/DocumentStyleSheetCollector.cpp
@@ -30,6 +30,7 @@
 
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StyleSheet.h"
+#include "core/dom/Document.h"
 #include "core/dom/DocumentStyleSheetCollection.h"
 
 namespace blink {
@@ -44,13 +45,8 @@ DocumentStyleSheetCollector::DocumentStyleSheetCollector(
 
 DocumentStyleSheetCollector::~DocumentStyleSheetCollector() {}
 
-void DocumentStyleSheetCollector::appendActiveStyleSheets(
-    const HeapVector<TraceWrapperMember<CSSStyleSheet>>& sheets) {
-  DCHECK(m_collection);
-  m_collection->appendActiveStyleSheets(sheets);
-}
-
-void DocumentStyleSheetCollector::appendActiveStyleSheet(CSSStyleSheet* sheet) {
+void DocumentStyleSheetCollector::appendActiveStyleSheet(
+    const ActiveStyleSheet& sheet) {
   DCHECK(m_collection);
   m_collection->appendActiveStyleSheet(sheet);
 }