Use scoped_ptr to pass settings in PrintJobWorker and PrinterQuery.

chrome/browser/printing/print_job_worker.h

Index: chrome/browser/printing/print_job_worker.h
diff --git a/chrome/browser/printing/print_job_worker.h b/chrome/browser/printing/print_job_worker.h
index c3c9cf51b04699549aa258640186ef5835307b70..e3e9a6747014fb4a97fe0bd7c6ae40395f4a3c06 100644
--- a/chrome/browser/printing/print_job_worker.h
+++ b/chrome/browser/printing/print_job_worker.h
@@ -52,9 +52,9 @@ class PrintJobWorker {
       bool has_selection,
       MarginType margin_type);
 
-  // Set the new print settings. This function takes ownership of
-  // |new_settings|.
-  void SetSettings(const base::DictionaryValue* const new_settings);
+  // Set the new print settings.
+  void SetSettings(
+      scoped_ptr<base::DictionaryValue> new_settings);
 
   // Starts the printing loop. Every pages are printed as soon as the data is
   // available. Makes sure the new_document is the right one.
@@ -122,9 +122,8 @@ class PrintJobWorker {
   // back into the IO thread for GetSettingsDone().
   void GetSettingsWithUIDone(PrintingContext::Result result);
 
-  // Called on the UI thread to update the print settings. This function takes
-  // the ownership of |new_settings|.
-  void UpdatePrintSettings(const base::DictionaryValue* const new_settings);
+  // Called on the UI thread to update the print settings.
+  void UpdatePrintSettings(scoped_ptr<base::DictionaryValue> new_settings);
 
   // Reports settings back to owner_.
   void GetSettingsDone(PrintingContext::Result result);