Add compile assertions to enforce the sizes of all structs and enums in the C...

ppapi/c/dev/pp_file_info_dev.h

Index: ppapi/c/dev/pp_file_info_dev.h
===================================================================
--- ppapi/c/dev/pp_file_info_dev.h	(revision 68603)
+++ ppapi/c/dev/pp_file_info_dev.h	(working copy)
@@ -5,6 +5,7 @@
 #ifndef PPAPI_C_DEV_PP_FILE_INFO_DEV_H_
 #define PPAPI_C_DEV_PP_FILE_INFO_DEV_H_
 
+#include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_time.h"
 
@@ -13,12 +14,14 @@
   PP_FILETYPE_DIRECTORY,
   PP_FILETYPE_OTHER  // A catch-all for unidentified types.
 } PP_FileType_Dev;
+PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_FileType_Dev, 4);
 
 typedef enum {
   PP_FILESYSTEMTYPE_EXTERNAL,
   PP_FILESYSTEMTYPE_LOCALPERSISTENT,
   PP_FILESYSTEMTYPE_LOCALTEMPORARY
 } PP_FileSystemType_Dev;
+PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_FileSystemType_Dev, 4);
 
 struct PP_FileInfo_Dev {
   int64_t size;  // Measured in bytes
@@ -28,5 +31,6 @@
   PP_Time last_access_time;
   PP_Time last_modified_time;
 };
+PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_FileInfo_Dev, 40);
 
 #endif  // PPAPI_C_DEV_PP_FILE_INFO_DEV_H_