base::Bind: Convert NewRunnableMethod in chrome/browser.

chrome/browser/download/download_prefs.cc

Index: chrome/browser/download/download_prefs.cc
diff --git a/chrome/browser/download/download_prefs.cc b/chrome/browser/download/download_prefs.cc
index ff57eb185c8b6e06e7ae8ec8bd4644f4b5ecc5da..6096ac53989abf16efea784eee062d6fa40ca1e2 100644
--- a/chrome/browser/download/download_prefs.cc
+++ b/chrome/browser/download/download_prefs.cc
@@ -81,7 +81,8 @@ void DownloadPrefs::RegisterUserPrefs(PrefService* prefs) {
   // Ensure that the download directory specified in the preferences exists.
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
-      NewRunnableFunction(&file_util::CreateDirectory, default_download_path));
+      base::Bind(base::IgnoreResult(&file_util::CreateDirectory),
+                 default_download_path));
 #endif  // defined(OS_CHROMEOS)
 
   // If the download path is dangerous we forcefully reset it. But if we do