Do not block painting for in-body CSS

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index a54bd6b84c3e8ec8ff06867d96bc01891e02efbb..1f5535ca58e0fe7a6cb0b531709aa07973e8ddad 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -3074,7 +3074,7 @@ void Document::didLoadAllScriptBlockingResources()
 
 void Document::executeScriptsWaitingForResources()
 {
-    if (!isRenderingReady())
+    if (!isScriptExecutionReady())
         return;
     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
         parser->executeScriptsWaitingForResources();
@@ -5656,6 +5656,13 @@ bool Document::haveStylesheetsLoaded() const
     return m_styleEngine->haveStylesheetsLoaded();
 }
 
+bool Document::haveRenderBlockingStylesheetsLoaded() const
+{
+    if (RuntimeEnabledFeatures::cssInBodyDoesNotBlockPaintEnabled())
+        return m_styleEngine->haveRenderBlockingStylesheetsLoaded();
+    return m_styleEngine->haveStylesheetsLoaded();
+}
+
 Locale& Document::getCachedLocale(const AtomicString& locale)
 {
     AtomicString localeKey = locale;