Provide nanoseconds precision for base::PlatformFileInfo on POSIX

base/file_util_posix.cc

Index: base/file_util_posix.cc
diff --git a/base/file_util_posix.cc b/base/file_util_posix.cc
index 7ef09a200de29c96c1f3f49e7002e50798488ec0..02d99ce9e099ccceafcbfa54f5f0bf52ed155f18 100644
--- a/base/file_util_posix.cc
+++ b/base/file_util_posix.cc
@@ -588,9 +588,15 @@ bool GetFileInfo(const FilePath& file_path, base::PlatformFileInfo* results) {
     return false;
   results->is_directory = S_ISDIR(file_info.st_mode);
   results->size = file_info.st_size;
-  results->last_modified = base::Time::FromTimeT(file_info.st_mtime);
-  results->last_accessed = base::Time::FromTimeT(file_info.st_atime);
-  results->creation_time = base::Time::FromTimeT(file_info.st_ctime);
+  results->last_modified = base::Time::FromDoubleT(file_info.st_mtim.tv_sec +
+      static_cast<double>(file_info.st_mtim.tv_nsec) /
+          base::Time::kNanosecondsPerSecond);
+  results->last_accessed = base::Time::FromDoubleT(file_info.st_atim.tv_sec +
+      static_cast<double>(file_info.st_atim.tv_nsec) /
+          base::Time::kNanosecondsPerSecond);
+  results->creation_time = base::Time::FromDoubleT(file_info.st_ctim.tv_sec +
+      static_cast<double>(file_info.st_ctim.tv_nsec) /
+          base::Time::kNanosecondsPerSecond);

[tzik, 2013/06/05 04:00:17]

Can we add Time::FromTimeSpec(const timespec&) and use it for these three?
Or, just FromTimeT(tv_sec) +
FromMicroseconds(tv_nsec/kNanosecondsPerMicroseconds) may work?

[apavlov, 2013/06/05 17:03:41]

Done.

   return true;
 }