Enable print as image by default

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 86dc6f6d31bc265a3b4a2c3e4d9945309f3ce9b5..d8cc7cd24a25c8d6a6fb6d556e3b8fb98c39c11d 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -116,12 +116,13 @@ const char kForceTabletModeClamshell[] = "Clamshell";
 const char kForceTabletModeAuto[] = "Auto (default)";
 
 //  Print Preview features
-
+#if !defined(OS_WIN) && !defined(OS_MACOSX)
 const char kPrintPdfAsImageName[] = "Print Pdf as Image";
 
 const char kPrintPdfAsImageDescription[] =
     "If enabled, an option to print PDF files as images will be available "
     "in print preview.";
+#endif
 
 #if !defined(DISABLE_NACL)