Add a TouchFile function that operates on FilePaths + fixing a bug...

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 60236)
+++ base/file_util_posix.cc	(working copy)
@@ -486,13 +486,6 @@
   return true;
 }
 
-bool SetLastModifiedTime(const FilePath& file_path, base::Time last_modified) {
-  struct timeval times[2];
-  times[0] = last_modified.ToTimeVal();
-  times[1] = last_modified.ToTimeVal();
-  return (utimes(file_path.value().c_str(), times) == 0);
-}
-
 bool GetInode(const FilePath& path, ino_t* inode) {
   struct stat buffer;
   int result = stat(path.value().c_str(), &buffer);