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

chrome/browser/download/download_util.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Download utility implementation
 
 #include "chrome/browser/download/download_util.h"
 
 #if defined(OS_WIN)
 #include <shobjidl.h>
@@ skipping 185 matching lines @@
 
   DCHECK(!generated_name->empty());
 
   GenerateSafeFileName(mime_type, generated_name);
 }
 
 }  // namespace
 
 // Download temporary file creation --------------------------------------------
 
-class DefaultDownloadDirectory {
- public:
-  const FilePath& path() const { return path_; }
- private:
-  DefaultDownloadDirectory() {
-    if (!PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS, &path_)) {
+FilePath GetDefaultDownloadDirectoryFromPathService() {
+  FilePath default_download_dir;
+  if (!PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS, &default_download_dir))
+    NOTREACHED();
+  if (DownloadPathIsDangerous(default_download_dir)) {
+    if (!PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS_SAFE,
+                          &default_download_dir))
       NOTREACHED();
-    }
-    if (DownloadPathIsDangerous(path_)) {
-      if (!PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS_SAFE, &path_)) {
-        NOTREACHED();
-      }
-    }
   }
-  friend struct base::DefaultLazyInstanceTraits<DefaultDownloadDirectory>;
-  FilePath path_;
-};
-
-static base::LazyInstance<DefaultDownloadDirectory>
-    g_default_download_directory(base::LINKER_INITIALIZED);
-
-const FilePath& GetDefaultDownloadDirectory() {
-  return g_default_download_directory.Get().path();
-}
-
-bool CreateTemporaryFileForDownload(FilePath* temp_file) {
-  if (file_util::CreateTemporaryFileInDir(GetDefaultDownloadDirectory(),
-                                          temp_file))
-    return true;
-  return file_util::CreateTemporaryFile(temp_file);
+  return default_download_dir;
 }
 
 bool DownloadPathIsDangerous(const FilePath& download_path) {
   FilePath desktop_dir;
   if (!PathService::Get(chrome::DIR_USER_DESKTOP, &desktop_dir)) {
     NOTREACHED();
     return false;
   }
   return (download_path == desktop_dir);
 }
@@ skipping 657 matching lines @@
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
   FilePath::StringType file_name;
   base::SStringPrintf(
       &file_name,
       PRFilePathLiteral FILE_PATH_LITERAL(".crdownload"),
       suggested_path.value().c_str());
   return FilePath(file_name);
 }
 
 }  // namespace download_util