Collect active stylesheets and and apply asynchronously.

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

Index: third_party/WebKit/Source/core/dom/StyleSheetCollection.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleSheetCollection.cpp b/third_party/WebKit/Source/core/dom/StyleSheetCollection.cpp
index 3359f3306133a8370a5618e72e35bbbb8aa803e1..7a0dfe3436ea767852c49da2dd440661b289d8fe 100644
--- a/third_party/WebKit/Source/core/dom/StyleSheetCollection.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleSheetCollection.cpp
@@ -29,6 +29,7 @@
 #include "core/dom/StyleSheetCollection.h"
 
 #include "core/css/CSSStyleSheet.h"
+#include "core/css/RuleSet.h"
 
 namespace blink {
 
@@ -52,20 +53,9 @@ void StyleSheetCollection::swapSheetsForSheetList(
   ::blink::swap(m_styleSheetsForStyleSheetList, sheets, this);
 }
 
-void StyleSheetCollection::appendActiveStyleSheet(CSSStyleSheet* sheet) {
-  m_activeAuthorStyleSheets.push_back(sheet);
-}
-
-void StyleSheetCollection::appendActiveStyleSheets(
-    const HeapVector<Member<CSSStyleSheet>>& sheets) {
-  m_activeAuthorStyleSheets.appendVector(sheets);
-}
-
-void StyleSheetCollection::appendActiveStyleSheets(
-    const HeapVector<TraceWrapperMember<CSSStyleSheet>>& sheets) {
-  for (CSSStyleSheet* sheet : sheets) {
-    m_activeAuthorStyleSheets.push_back(sheet);
-  }
+void StyleSheetCollection::appendActiveStyleSheet(
+    const ActiveStyleSheet& activeSheet) {
+  m_activeAuthorStyleSheets.push_back(activeSheet);
 }
 
 void StyleSheetCollection::appendSheetForList(StyleSheet* sheet) {