[dart:io] Adds functions to set file access and modification time

sdk/lib/io/io_service.dart

Index: sdk/lib/io/io_service.dart
diff --git a/sdk/lib/io/io_service.dart b/sdk/lib/io/io_service.dart
index cabba545812822c905dac9eaed55cbfe20c88cca..0ed4439ba82e33094fe3597863a093758e6b32e2 100644
--- a/sdk/lib/io/io_service.dart
+++ b/sdk/lib/io/io_service.dart
@@ -18,33 +18,36 @@ const int _FILE_SET_POSITION = 9;
 const int _FILE_TRUNCATE = 10;
 const int _FILE_LENGTH = 11;
 const int _FILE_LENGTH_FROM_PATH = 12;
-const int _FILE_LAST_MODIFIED = 13;
-const int _FILE_FLUSH = 14;
-const int _FILE_READ_BYTE = 15;
-const int _FILE_WRITE_BYTE = 16;
-const int _FILE_READ = 17;
-const int _FILE_READ_INTO = 18;
-const int _FILE_WRITE_FROM = 19;
-const int _FILE_CREATE_LINK = 20;
-const int _FILE_DELETE_LINK = 21;
-const int _FILE_RENAME_LINK = 22;
-const int _FILE_LINK_TARGET = 23;
-const int _FILE_TYPE = 24;
-const int _FILE_IDENTICAL = 25;
-const int _FILE_STAT = 26;
-const int _FILE_LOCK = 27;
-const int _SOCKET_LOOKUP = 28;
-const int _SOCKET_LIST_INTERFACES = 29;
-const int _SOCKET_REVERSE_LOOKUP = 30;
-const int _DIRECTORY_CREATE = 31;
-const int _DIRECTORY_DELETE = 32;
-const int _DIRECTORY_EXISTS = 33;
-const int _DIRECTORY_CREATE_TEMP = 34;
-const int _DIRECTORY_LIST_START = 35;
-const int _DIRECTORY_LIST_NEXT = 36;
-const int _DIRECTORY_LIST_STOP = 37;
-const int _DIRECTORY_RENAME = 38;
-const int _SSL_PROCESS_FILTER = 39;
+const int _FILE_LAST_ACCESSED = 13;
+const int _FILE_SET_LAST_ACCESSED = 14;
+const int _FILE_LAST_MODIFIED = 15;
+const int _FILE_SET_LAST_MODIFIED = 16;
+const int _FILE_FLUSH = 17;
+const int _FILE_READ_BYTE = 18;
+const int _FILE_WRITE_BYTE = 19;
+const int _FILE_READ = 20;
+const int _FILE_READ_INTO = 21;
+const int _FILE_WRITE_FROM = 22;
+const int _FILE_CREATE_LINK = 23;
+const int _FILE_DELETE_LINK = 24;
+const int _FILE_RENAME_LINK = 25;
+const int _FILE_LINK_TARGET = 26;
+const int _FILE_TYPE = 27;
+const int _FILE_IDENTICAL = 28;
+const int _FILE_STAT = 29;
+const int _FILE_LOCK = 30;
+const int _SOCKET_LOOKUP = 31;
+const int _SOCKET_LIST_INTERFACES = 32;
+const int _SOCKET_REVERSE_LOOKUP = 33;
+const int _DIRECTORY_CREATE = 34;
+const int _DIRECTORY_DELETE = 35;
+const int _DIRECTORY_EXISTS = 36;
+const int _DIRECTORY_CREATE_TEMP = 37;
+const int _DIRECTORY_LIST_START = 38;
+const int _DIRECTORY_LIST_NEXT = 39;
+const int _DIRECTORY_LIST_STOP = 40;
+const int _DIRECTORY_RENAME = 41;
+const int _SSL_PROCESS_FILTER = 42;
 
 class _IOService {
   external static Future _dispatch(int request, List data);