Print preview not showing if default print is invalid.

chrome/renderer/mock_printer.h

Index: chrome/renderer/mock_printer.h
diff --git a/chrome/renderer/mock_printer.h b/chrome/renderer/mock_printer.h
index 0a857807c84c8d2712589838eb7cd1ef694e60b2..50d561255273b7e7ade69edc0596cd04359be8b9 100644
--- a/chrome/renderer/mock_printer.h
+++ b/chrome/renderer/mock_printer.h
@@ -69,6 +69,7 @@ class MockPrinter {
   // Functions that changes settings of a pseudo printer.
   void ResetPrinter();
   void SetDefaultPrintSettings(const PrintMsg_Print_Params& params);
+  void SetBadSettings(bool be_evil);  // Always return bad settings if evil.
 
   // Functions that handles IPC events.
   void GetDefaultPrintSettings(PrintMsg_Print_Params* params);
@@ -141,6 +142,9 @@ class MockPrinter {
   string16 title_;
   string16 url_;
 
+  // Used for generating evil settings.
+  bool evil_;

[kmadhusu, 2011/08/26 18:50:40]

bool use_invalid_settings_;

[arthurhsu, 2011/08/29 22:53:16]

Done.

+
   std::vector<scoped_refptr<MockPrinterPage> > pages_;
 
   DISALLOW_COPY_AND_ASSIGN(MockPrinter);