Convert a few ppapi dev interfaces to IDL. NaCl has tests for these

ppapi/api/dev/ppp_printing_dev.idl

 /* Copyright (c) 2011 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef PPAPI_C_DEV_PPP_PRINTING_DEV_H_
-#define PPAPI_C_DEV_PPP_PRINTING_DEV_H_
 
-#include "ppapi/c/pp_bool.h"
-#include "ppapi/c/pp_instance.h"
-#include "ppapi/c/pp_macros.h"
-#include "ppapi/c/pp_rect.h"
-#include "ppapi/c/pp_resource.h"
-#include "ppapi/c/pp_stdint.h"
+/**
+ * Implementation of the Printing interface.
+ */
 
-typedef enum {
+label Chrome {
+  M14 = 0.5
+};
+
+[assert_size(4)]
+enum PP_PrintOrientation_Dev {
   PP_PRINTORIENTATION_NORMAL         = 0,
   PP_PRINTORIENTATION_ROTATED_90_CW  = 1,
   PP_PRINTORIENTATION_ROTATED_180    = 2,
   PP_PRINTORIENTATION_ROTATED_90_CCW = 3
-} PP_PrintOrientation_Dev;
-PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_PrintOrientation_Dev, 4);
+};
 
-typedef enum {
+[assert_size(4)]
+enum PP_PrintOutputFormat_Dev {
   PP_PRINTOUTPUTFORMAT_RASTER     = 1u << 0,
   PP_PRINTOUTPUTFORMAT_PDF        = 1u << 1,
   PP_PRINTOUTPUTFORMAT_POSTSCRIPT = 1u << 2,
   PP_PRINTOUTPUTFORMAT_EMF        = 1u << 3
-} PP_PrintOutputFormat_Dev;
-PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_PrintOutputFormat_Dev, 4);
+};
 
+[assert_size(32)]
 struct PP_PrintSettings_Dev {
   /** This is the size of the printable area in points (1/72 of an inch) */
-  struct PP_Rect printable_area;
+  PP_Rect printable_area;
   int32_t dpi;
   PP_PrintOrientation_Dev orientation;
   PP_Bool grayscale;
   PP_PrintOutputFormat_Dev format;
 };
-PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_PrintSettings_Dev, 32);
 
 /**
  * Specifies a contiguous range of page numbers to be printed.
  * The page numbers use a zero-based index.
  */
+[assert_size(8)]
 struct PP_PrintPageNumberRange_Dev {
   uint32_t first_page_number;
   uint32_t last_page_number;
 };
-PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_PrintPageNumberRange_Dev, 8);
 
-/* Interface for the plugin to implement printing. */
-#define PPP_PRINTING_DEV_INTERFACE_0_5 "PPP_Printing(Dev);0.5"
-#define PPP_PRINTING_DEV_INTERFACE PPP_PRINTING_DEV_INTERFACE_0_5
-
-struct PPP_Printing_Dev {
+interface PPP_Printing_Dev {
   /**
    *  Returns a bit field representing the supported print output formats.  For
    *  example, if only Raster and PostScript are supported,
    *  QuerySupportedFormats returns a value equivalent to:
    *  (PP_PRINTOUTPUTFORMAT_RASTER | PP_PRINTOUTPUTFORMAT_POSTSCRIPT)
    */
-  uint32_t (*QuerySupportedFormats)(PP_Instance instance);
+  uint32_t QuerySupportedFormats([in] PP_Instance instance);
 
   /**
    * Begins a print session with the given print settings. Calls to PrintPage
    * can only be made after a successful call to Begin. Returns the number of
    * pages required for the print output at the given page size (0 indicates
    * a failure).
    */
-  int32_t (*Begin)(PP_Instance instance,
-                   const struct PP_PrintSettings_Dev* print_settings);
+  int32_t Begin([in] PP_Instance instance,
+                [in] PP_PrintSettings_Dev print_settings);
 
   /**
    * Prints the specified pages using the format specified in Begin.
    * Returns a resource that represents the printed output.
    * This is a PPB_ImageData resource if the output format is
    * PP_PrintOutputFormat_Raster and a PPB_Blob otherwise. Returns 0 on
    * failure.
    */
-  PP_Resource (*PrintPages)(
-      PP_Instance instance,
-      const struct PP_PrintPageNumberRange_Dev* page_ranges,
-      uint32_t page_range_count);
+  PP_Resource PrintPages([in] PP_Instance instance,
+                         [in] PP_PrintPageNumberRange_Dev page_ranges,
+                         [in] uint32_t page_range_count);
 
   /** Ends the print session. Further calls to PrintPage will fail. */
-  void (*End)(PP_Instance instance);
+  void End([in] PP_Instance instance);
 
   /**
    *  Returns true if the current content should be printed into the full page
    *  and not scaled down to fit within the printer's printable area.
    */
-  PP_Bool (*IsScalingDisabled)(PP_Instance instance);
+  PP_Bool IsScalingDisabled([in] PP_Instance instance);
 };
 
-#endif  /* PPAPI_C_DEV_PPP_PRINTING_DEV_H_ */
-