'haveImportsLoaded' shouldn't block rendering, if ignoringPendingStylesheets.

third_party/WebKit/Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 431 matching lines @@
   StyleResolver& ensureStyleResolver() const;
 
   bool isViewSource() const { return m_isViewSource; }
   void setIsViewSource(bool);
 
   bool sawElementsInKnownNamespaces() const {
     return m_sawElementsInKnownNamespaces;
   }
 
   bool canExecuteScripts(ReasonForCallingCanExecuteScripts) override;
-  bool isRenderingReady() const {
-    return haveImportsLoaded() && haveRenderBlockingStylesheetsLoaded();
-  }
+  bool isRenderingReady() const;
   bool isScriptExecutionReady() const {
     return haveImportsLoaded() && haveScriptBlockingStylesheetsLoaded();
   }
 
   // This is a DOM function.
   StyleSheetList& styleSheets();
 
   StyleEngine& styleEngine() {
     DCHECK(m_styleEngine.get());
     return *m_styleEngine.get();
@@ skipping 1259 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif  // Document_h