Convert //printing to use std::unique_ptr

printing/backend/printing_info_win.h

Index: printing/backend/printing_info_win.h
diff --git a/printing/backend/printing_info_win.h b/printing/backend/printing_info_win.h
index 896ed12a763be49d43e5cee6baa25431ed0a0c8d..0fd1160efc5935065986ce71d5b9cbaabcb7ed5a 100644
--- a/printing/backend/printing_info_win.h
+++ b/printing/backend/printing_info_win.h
@@ -9,7 +9,8 @@
 #include <stdint.h>
 #include <winspool.h>
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "printing/printing_export.h"
 
 namespace printing {
@@ -34,7 +35,7 @@ class PrinterInfo {
   }
 
  private:
-  scoped_ptr<uint8_t[]> buffer_;
+  std::unique_ptr<uint8_t[]> buffer_;
 };
 
 // This class is designed to work with DRIVER_INFO_X structures
@@ -52,7 +53,7 @@ class DriverInfo {
   }
 
  private:
-  scoped_ptr<uint8_t[]> buffer_;
+  std::unique_ptr<uint8_t[]> buffer_;
 };
 
 }  // namespace internal