Add Postscript Printing

printing/printed_document.cc

Index: printing/printed_document.cc
diff --git a/printing/printed_document.cc b/printing/printed_document.cc
index 047d2dbcb7915923df112230ff50e1557342f3cd..3743ca85ffe2bd2f55f9dc793da492a5b2bf22f6 100644
--- a/printing/printed_document.cc
+++ b/printing/printed_document.cc
@@ -111,9 +111,7 @@ PrintedDocument::~PrintedDocument() {
 
 void PrintedDocument::SetPage(int page_number,
                               std::unique_ptr<MetafilePlayer> metafile,
-#if defined(OS_WIN)
                               float shrink,
-#endif  // OS_WIN
                               const gfx::Size& paper_size,
                               const gfx::Rect& page_rect) {
   // Notice the page_number + 1, the reason is that this is the value that will
@@ -122,7 +120,7 @@ void PrintedDocument::SetPage(int page_number,
       page_number + 1, std::move(metafile), paper_size, page_rect));
 #if defined(OS_WIN)
   page->set_shrink_factor(shrink);
-#endif  // OS_WIN
+#endif
   {
     base::AutoLock lock(lock_);
     mutable_.pages_[page_number] = page;