Printing fixups for scoped_refptr operator T* removal.

BUG=110610

Review URL: https://codereview.chromium.org/509423002

Cr-Commit-Position: refs/heads/master@{#293104}

chrome/browser/local_discovery/service_discovery_shared_client.h

@@ -15,8 +15,8 @@ class ServiceDiscoverySharedClient
  public:
   static scoped_refptr<ServiceDiscoverySharedClient> GetInstance();
 
-  typedef base::Callback<void(scoped_refptr<ServiceDiscoverySharedClient>)>
-      GetInstanceCallback;
+  typedef base::Callback<void(
+      const scoped_refptr<ServiceDiscoverySharedClient>&)> GetInstanceCallback;
   static void GetInstanceWithoutAlert(const GetInstanceCallback& callback);
 
  protected:

chrome/browser/printing/printing_message_filter.cc

@@ -427,7 +427,7 @@ void PrintingMessageFilter::OnUpdatePrintSettingsReply(
   PrintHostMsg_UpdatePrintSettings::WriteReplyParams(
       reply_msg,
       params,
-      printer_query &&
+      printer_query.get() &&
           (printer_query->last_status() == printing::PrintingContext::CANCEL));
   Send(reply_msg);
   // If user hasn't cancelled.

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

@@ -1369,13 +1369,14 @@ bool PrintPreviewHandler::GetPreviewDataAndTitle(
 
 #if defined(ENABLE_SERVICE_DISCOVERY)
 
-void PrintPreviewHandler::StartPrivetLister(
-    scoped_refptr<local_discovery::ServiceDiscoverySharedClient> client) {
+void PrintPreviewHandler::StartPrivetLister(const scoped_refptr<
+    local_discovery::ServiceDiscoverySharedClient>& client) {
   if (!PrivetPrintingEnabled())
     return web_ui()->CallJavascriptFunction("onPrivetPrinterSearchDone");
 
   Profile* profile = Profile::FromWebUI(web_ui());
-  DCHECK(!service_discovery_client_ || service_discovery_client_ == client);
+  DCHECK(!service_discovery_client_.get() ||
+         service_discovery_client_ == client);
   service_discovery_client_ = client;
   printer_lister_.reset(new local_discovery::PrivetLocalPrinterLister(
       service_discovery_client_.get(), profile->GetRequestContext(), this));

chrome/browser/ui/webui/print_preview/print_preview_handler.h

@@ -260,8 +260,8 @@ class PrintPreviewHandler
 #endif
 
 #if defined(ENABLE_SERVICE_DISCOVERY)
-  void StartPrivetLister(
-      scoped_refptr<local_discovery::ServiceDiscoverySharedClient> client);
+  void StartPrivetLister(const scoped_refptr<
+      local_discovery::ServiceDiscoverySharedClient>& client);
   void OnPrivetCapabilities(const base::DictionaryValue* capabilities);
   void PrivetCapabilitiesUpdateClient(
       scoped_ptr<local_discovery::PrivetHTTPClient> http_client);