PPAPI: Implement PPB_FileMapping on POSIX

ppapi/api/ppb_file_mapping.idl

Index: ppapi/api/ppb_file_mapping.idl
diff --git a/ppapi/api/dev/ppb_file_io_dev.idl b/ppapi/api/ppb_file_mapping.idl
similarity index 84%
rename from ppapi/api/dev/ppb_file_io_dev.idl
rename to ppapi/api/ppb_file_mapping.idl
index 82a645211168da8b53a6625fdaf8af28d6b80845..c325c4a392d776ee7886541fb17b7d37ca49b19e 100644
--- a/ppapi/api/dev/ppb_file_io_dev.idl
+++ b/ppapi/api/ppb_file_mapping.idl
@@ -9,9 +9,10 @@
  * stable in the future. For now, they can be used only in plugins with DEV
  * permissions.
  */
+[generate_thunk]
 
 label Chrome {
-  M31 = 0.1
+  [channel=dev] M34 = 0.1
 };
 
 /**
@@ -19,7 +20,7 @@ label Chrome {
  * file mapping. These should be used in a uint32_t bitfield.
  */
 [assert_size(4)]
- enum PP_FileMapProtection {
+enum PP_FileMapProtection {
   /** Requests read access to the mapped address. */
   PP_FILEMAPPROTECTION_READ = 1u << 0,
 
@@ -31,7 +32,7 @@ label Chrome {
  * The PP_FileMapFlags contain flag values for use with Map().
  */
 [assert_size(4)]
- enum PP_FileMapFlags {
+enum PP_FileMapFlags {
   /**
    * Requests a shared mapping. If this flag is set, changes written to the
    * memory region will be reflected in the underlying file and will thus
@@ -56,12 +57,13 @@ label Chrome {
 };
 
 /**
- *  PPB_FileIO_Dev contains functions that are usable with PPB_FileIO resources
+ *  PPB_FileMapping contains functions that are usable with PPB_FileIO resources
  *  but aren't yet considered stable yet and thus are not supported for general
  *  NaCl or PNaCl apps yet. Features here are being tested and refined for
  *  possible future inclusion in (stable) PPB_FileIO.
  */
-interface PPB_FileIO_Dev {
+[singleton]
+interface PPB_FileMapping {
   /**
    * Map() maps the contents from an offset of the file into memory.
    *
@@ -87,7 +89,9 @@ interface PPB_FileIO_Dev {
    *
    * @return An int32_t containing an error code from <code>pp_errors.h</code>.
    */
-  int32_t Map([in] PP_Resource file_io,
+[singleton]
+  int32_t Map([in] PP_Instance instance,
+              [in] PP_Resource file_io,
               [in] int64_t length,
               [in] uint32_t map_protection,
               [in] uint32_t map_flags,
@@ -96,21 +100,21 @@ interface PPB_FileIO_Dev {
               [in] PP_CompletionCallback callback);
 
   /**
-   * Unmap() deletes the mapping of the specified address address to a
-   * file io.  The specified address must have been retrieved with
-   * Map().
-   * @param[in] file_io A PP_Resource corresponding to a file.
+   * Unmap() deletes the mapping of the specified address.  The specified
+   * address must have been retrieved with Map().
+   * @param[in] instance A <code>PP_Instance</code> identifying the instance.
    * @param[in] address The starting address of the address in memory to
    * be unmapped.
    * @param[in] length The length of the region to unmap.
    */
-  void Unmap(PP_Resource file_io, mem_t address, int64_t length);
+  void Unmap(PP_Instance file_io, mem_t address, int64_t length);
 
   /**
    * GetMapPageSize() returns the size of pages that Map() uses. Returns 0 on
    * failure.
+   * @param[in] instance A <code>PP_Instance</code> identifying the instance.
    */
   [on_failure=0]
-  int64_t GetMapPageSize(PP_Resource file_io);
+  int64_t GetMapPageSize(PP_Instance file_io);
 };