Implement nacl_irt_clock for non-sfi mode.

components/nacl/loader/nonsfi/abi_conversion.h

Index: components/nacl/loader/nonsfi/abi_conversion.h
diff --git a/components/nacl/loader/nonsfi/abi_conversion.h b/components/nacl/loader/nonsfi/abi_conversion.h
index 13479e27eb489a9cd4c8dfe437b8774a9e345d3c..771f2dcff650e8e088c5b844f15477ddef2707e3 100644
--- a/components/nacl/loader/nonsfi/abi_conversion.h
+++ b/components/nacl/loader/nonsfi/abi_conversion.h
@@ -6,11 +6,22 @@
 #define COMPONENTS_NACL_LOADER_NONSFI_ABI_CONVERSION_H_
 
 struct stat;
+struct timespec;
 struct nacl_abi_stat;
+struct nacl_abi_timespec;
 
 namespace nacl {
 namespace nonsfi {
 
+// Converts the timespec struct from NaCl's to host's ABI.
+void NaClAbiTimeSpecToTimeSpec(const struct nacl_abi_timespec& nacl_timespec,
+                               struct timespec* host_timespec);
+
+// Converts the timespec struct from host's to NaCl's ABI.
+void TimeSpecToNaClAbiTimeSpec(const struct timespec& host_timespec,
+                               struct nacl_abi_timespec* nacl_timespec);
+
+
 // Converts the stat struct from host's to NaCl's ABI.
 void StatToNaClAbiStat(
     const struct stat& host_stat, struct nacl_abi_stat* nacl_stat);