Update a broken link.

BUG=none

Review URL: https://codereview.chromium.org/1817133002

Cr-Commit-Position: refs/heads/master@{#382310}
diff --git a/base/files/important_file_writer.h b/base/files/important_file_writer.h
index 4d18c0bd..b28231e 100644
--- a/base/files/important_file_writer.h
+++ b/base/files/important_file_writer.h
@@ -36,7 +36,7 @@
 // temporary file to target filename.
 //
 // If you want to know more about this approach and ext3/ext4 fsync issues, see
-// http://valhenson.livejournal.com/37921.html
+// http://blog.valerieaurora.org/2009/04/16/dont-panic-fsync-ext34-and-your-data/
 class BASE_EXPORT ImportantFileWriter : public NonThreadSafe {
  public:
   // Used by ScheduleSave to lazily provide the data to be saved. Allows us