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

chrome/browser/printing/printing_message_filter.cc

Index: chrome/browser/printing/printing_message_filter.cc
diff --git a/chrome/browser/printing/printing_message_filter.cc b/chrome/browser/printing/printing_message_filter.cc
index f9f2454df6c349ff6273879704c5283daafc3f43..31bf8ea24481f782160a0137ad6b9e4fc20ba475 100644
--- a/chrome/browser/printing/printing_message_filter.cc
+++ b/chrome/browser/printing/printing_message_filter.cc
@@ -97,7 +97,7 @@ PrintingMessageFilter::PrintingMessageFilter(int render_process_id,
           profile->GetResourceContext())),
       render_process_id_(render_process_id),
       queue_(g_browser_process->print_job_manager()->queue()) {
-  DCHECK(queue_);
+  DCHECK(queue_.get());
 }
 
 PrintingMessageFilter::~PrintingMessageFilter() {
@@ -273,7 +273,7 @@ void PrintingMessageFilter::OnGetDefaultPrintSettings(IPC::Message* reply_msg) {
     return;
   }
   printer_query = queue_->PopPrinterQuery(0);
-  if (!printer_query) {
+  if (!printer_query.get()) {
     printer_query =
         queue_->CreatePrinterQuery(render_process_id_, reply_msg->routing_id());
   }
@@ -320,7 +320,7 @@ void PrintingMessageFilter::OnScriptedPrint(
     IPC::Message* reply_msg) {
   scoped_refptr<PrinterQuery> printer_query =
       queue_->PopPrinterQuery(params.cookie);
-  if (!printer_query) {
+  if (!printer_query.get()) {
     printer_query =
         queue_->CreatePrinterQuery(render_process_id_, reply_msg->routing_id());
   }
@@ -395,7 +395,7 @@ void PrintingMessageFilter::OnUpdatePrintSettings(
     return;
   }
   printer_query = queue_->PopPrinterQuery(document_cookie);
-  if (!printer_query) {
+  if (!printer_query.get()) {
     int host_id = render_process_id_;
     int routing_id = reply_msg->routing_id();
     if (!new_settings->GetInteger(printing::kPreviewInitiatorHostId,