[Print Preview] Modified PP_PrintSettings_Dev interface to support auto fit to page functionality.

chrome/renderer/mock_printer.cc

Index: chrome/renderer/mock_printer.cc
diff --git a/chrome/renderer/mock_printer.cc b/chrome/renderer/mock_printer.cc
index 949e588d74b3117daf9f1284859d0e958555474c..ec0541589aa6d8eeb5c78e462737d40e04b8c0d6 100644
--- a/chrome/renderer/mock_printer.cc
+++ b/chrome/renderer/mock_printer.cc
@@ -65,6 +65,7 @@ MockPrinter::MockPrinter()
     is_first_request_(true),
     print_to_pdf_(false),
     preview_request_id_(0),
+    fit_pdf_page_to_paper_size_(true),
     display_header_footer_(false),
     date_(ASCIIToUTF16("date")),
     title_(ASCIIToUTF16("title")),
@@ -152,6 +153,7 @@ void MockPrinter::ScriptedPrint(int cookie,
   settings->params.is_first_request = is_first_request_;
   settings->params.print_to_pdf = print_to_pdf_;
   settings->params.preview_request_id = preview_request_id_;
+  settings->params.fit_pdf_page_to_paper_size = fit_pdf_page_to_paper_size_;
   settings->params.display_header_footer = display_header_footer_;
   settings->params.date = date_;
   settings->params.title = title_;
@@ -305,6 +307,7 @@ void MockPrinter::SetPrintParams(PrintMsg_Print_Params* params) {
   params->is_first_request = is_first_request_;
   params->print_to_pdf = print_to_pdf_;
   params->preview_request_id = preview_request_id_;
+  params->fit_pdf_page_to_paper_size = fit_pdf_page_to_paper_size_;
   params->display_header_footer = display_header_footer_;
   params->date = date_;
   params->title = title_;