Remove implicit conversions from scoped_refptr to T* in chrome/browser/printing/

chrome/browser/printing/print_preview_message_handler.cc

Index: chrome/browser/printing/print_preview_message_handler.cc
diff --git a/chrome/browser/printing/print_preview_message_handler.cc b/chrome/browser/printing/print_preview_message_handler.cc
index a861540bd0c5a33a92a58ac36e9336411673f031..0aec73f9e7106836035e0d4ada3e6258cdac0eb0 100644
--- a/chrome/browser/printing/print_preview_message_handler.cc
+++ b/chrome/browser/printing/print_preview_message_handler.cc
@@ -38,7 +38,7 @@ void StopWorker(int document_cookie) {
       g_browser_process->print_job_manager()->queue();
   scoped_refptr<printing::PrinterQuery> printer_query =
       queue->PopPrinterQuery(document_cookie);
-  if (printer_query) {
+  if (printer_query.get()) {
     BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                             base::Bind(&printing::PrinterQuery::StopWorker,
                                        printer_query));