Revert of Collect active stylesheets and and apply asynchronously.

third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 1766 matching lines @@
   m_idToInspectorStyleSheetForInlineStyle.set(inspectorStyleSheet->id(),
                                               inspectorStyleSheet);
   m_nodeToInspectorStyleSheet.set(element, inspectorStyleSheet);
   return inspectorStyleSheet;
 }
 
 // static
 void InspectorCSSAgent::collectAllDocumentStyleSheets(
     Document* document,
     HeapVector<Member<CSSStyleSheet>>& result) {
-  for (const auto& style :
-       document->styleEngine().activeStyleSheetsForInspector())
-    InspectorCSSAgent::collectStyleSheets(style.first, result);
+  const HeapVector<Member<CSSStyleSheet>> activeStyleSheets =
+      document->styleEngine().activeStyleSheetsForInspector();
+  for (const auto& style : activeStyleSheets) {
+    CSSStyleSheet* styleSheet = style.get();
+    InspectorCSSAgent::collectStyleSheets(styleSheet, result);
+  }
 }
 
 // static
 void InspectorCSSAgent::collectStyleSheets(
     CSSStyleSheet* styleSheet,
     HeapVector<Member<CSSStyleSheet>>& result) {
   result.append(styleSheet);
   for (unsigned i = 0, size = styleSheet->length(); i < size; ++i) {
     CSSRule* rule = styleSheet->item(i);
     if (rule->type() == CSSRule::kImportRule) {
@@ skipping 714 matching lines @@
   visitor->trace(m_cssStyleSheetToInspectorStyleSheet);
   visitor->trace(m_documentToCSSStyleSheets);
   visitor->trace(m_invalidatedDocuments);
   visitor->trace(m_nodeToInspectorStyleSheet);
   visitor->trace(m_inspectorUserAgentStyleSheet);
   visitor->trace(m_tracker);
   InspectorBaseAgent::trace(visitor);
 }
 
 }  // namespace blink