Only populate line number in case parsing synchronously.

Source/core/xml/parser/XMLDocumentParser.cpp

Index: Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/Source/core/xml/parser/XMLDocumentParser.cpp b/Source/core/xml/parser/XMLDocumentParser.cpp
index 531e397b7eddf871ba1add52cc4876c270b0355e..52f2c1fce15bf4520ff6ff3dccc9996b643dc919 100644
--- a/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -1507,6 +1507,11 @@ xmlDocPtr xmlDocPtrForString(ResourceFetcher* fetcher, const String& source, con
     return xmlReadMemory(input.data(), input.size(), url.latin1().data(), input.encoding(), XSLT_PARSE_OPTIONS);
 }
 
+bool XMLDocumentParser::hasLineNumber() const
+{
+    return true;

[rmcilroy, 2014/12/12 14:18:31]

maybe return isParsing()?

[pfeldman, 2014/12/12 17:21:06]

Done, all necessary checks are in ScriptableDocumentParser now.

+}
+
 OrdinalNumber XMLDocumentParser::lineNumber() const
 {
     return OrdinalNumber::fromOneBasedInt(context() ? context()->input->line : 1);