Simplify document title for Windows printing.

printing/backend/print_backend.h

Index: printing/backend/print_backend.h
diff --git a/printing/backend/print_backend.h b/printing/backend/print_backend.h
index 3cbf162fce158bb9df2106ae6bde170754fe4af1..127caf5fde4e14c48eebd7b3519854c1481d56cf 100644
--- a/printing/backend/print_backend.h
+++ b/printing/backend/print_backend.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/memory/ref_counted.h"
+#include "base/string16.h"
 #include "printing/print_job_constants.h"
 #include "printing/printing_export.h"
 
@@ -92,6 +93,9 @@ class PRINTING_EXPORT PrintBackend
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
+  // Simplify title to resolve issue with some drivers.
+  static string16 SimplifyDocumentTitle(const string16& title);
+
   // Allocate a print backend. If |print_backend_settings| is NULL, default
   // settings will be used.
   // Return NULL if no print backend available.