Only populate line number in case parsing synchronously.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index a328b89957db811f7a24572dce0249adb060ab63..60e88e76cdaa763f82413afc5c5cb87c54c001c3 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -4994,9 +4994,9 @@ void Document::addConsoleMessage(PassRefPtrWillBeRawPtr<ConsoleMessage> consoleM
 
     if (!consoleMessage->scriptState() && consoleMessage->url().isNull() && !consoleMessage->lineNumber()) {
         consoleMessage->setURL(url().string());
-        if (!consoleMessage->isAsync() && parsing() && !isInDocumentWrite() && scriptableDocumentParser()) {
+        if (!isInDocumentWrite() && scriptableDocumentParser()) {
             ScriptableDocumentParser* parser = scriptableDocumentParser();
-            if (!parser->isWaitingForScripts() && !parser->isExecutingScript())
+            if (parser->isParsingAtLineNumber())
                 consoleMessage->setLineNumber(parser->lineNumber().oneBasedInt());
         }
     }