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

ppapi/api/dev/ppp_printing_dev.idl

Index: ppapi/api/dev/ppp_printing_dev.idl
diff --git a/ppapi/api/dev/ppp_printing_dev.idl b/ppapi/api/dev/ppp_printing_dev.idl
index 74f5f6a9394ab3123a3cbbae929528075b0e8d6f..d89916eedb63a691a71b9a91f921ba90a77215ef 100644
--- a/ppapi/api/dev/ppp_printing_dev.idl
+++ b/ppapi/api/dev/ppp_printing_dev.idl
@@ -8,7 +8,7 @@
  */
 
 label Chrome {
-  M14 = 0.5
+  M21 = 0.6
 };
 
 [assert_size(4)]
@@ -27,12 +27,22 @@ enum PP_PrintOutputFormat_Dev {
   PP_PRINTOUTPUTFORMAT_EMF        = 1u << 3
 };
 
-[assert_size(32)]
+[assert_size(4)]
+enum PP_PrintScalingOption_Dev {
+  PP_PRINTSCALINGOPTION_NONE = 0,
+  PP_PRINTSCALINGOPTION_FIT_TO_PRINTABLE_AREA = 1,
+  PP_PRINTSCALINGOPTION_SOURCE_SIZE = 2
+};
+
+[assert_size(60)]
 struct PP_PrintSettings_Dev {
   /** This is the size of the printable area in points (1/72 of an inch) */
   PP_Rect printable_area;
+  PP_Rect content_area;
+  PP_Size paper_size;
   int32_t dpi;
   PP_PrintOrientation_Dev orientation;
+  PP_PrintScalingOption_Dev print_scaling_option;
   PP_Bool grayscale;
   /** Note that Chrome currently only supports PDF printing. */
   PP_PrintOutputFormat_Dev format;