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

base/file_util.cc

Index: base/file_util.cc
===================================================================
--- base/file_util.cc	(revision 60236)
+++ base/file_util.cc	(working copy)
@@ -200,6 +200,28 @@
   return FILE_PATH_LITERAL("..") == path.BaseName().value();
 }
 
+bool TouchFile(const FilePath& path,
+               const base::Time& last_accessed,
+               const base::Time& last_modified) {
+  base::PlatformFile file =
+      base::CreatePlatformFile(path,
+                               base::PLATFORM_FILE_OPEN |
+                               base::PLATFORM_FILE_WRITE_ATTRIBUTES,
+                               NULL, NULL);
+  if (file != base::kInvalidPlatformFileValue) {
+    bool result = base::TouchPlatformFile(file, last_accessed, last_modified);
+    base::ClosePlatformFile(file);
+    return result;
+  }
+
+  return false;
+}
+
+bool SetLastModifiedTime(const FilePath& path,
+                         const base::Time& last_modified) {
+  return TouchFile(path, last_modified, last_modified);
+}
+
 bool CloseFile(FILE* file) {
   if (file == NULL)
     return true;