When the download folder does not exist, change the download folder to a user's "Downloads"

chrome/browser/download/download_util.h

Index: chrome/browser/download/download_util.h
diff --git a/chrome/browser/download/download_util.h b/chrome/browser/download/download_util.h
index c279973a768eecd21a2a755a128d63c7499afb88..e2efb28719ef358e9b550d19df49d92241e3ee22 100644
--- a/chrome/browser/download/download_util.h
+++ b/chrome/browser/download/download_util.h
@@ -50,12 +50,12 @@ namespace download_util {
 
 // Download temporary file creation --------------------------------------------
 
-// Return the default download directory.
-const FilePath& GetDefaultDownloadDirectory();
-
-// Create a temporary file for a download in the user's default download
-// directory and return true if was successful in creating the file.
-bool CreateTemporaryFileForDownload(FilePath* path);
+// Returns the user's default "Downloads" folder provided by PathService.
+// This method always returns the folder provided by PathService
+// even if the folder is being overridden. We should use
+// DownloadPrefs::GetDefaultDownloadDirectory() instead unless we really
+// want the folder directly provided by PathService.
+FilePath GetDefaultDownloadDirectoryFromPathService();
 
 // Return true if the |download_path| is dangerous path.
 bool DownloadPathIsDangerous(const FilePath& download_path);