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

content/browser/download/base_file.cc

Index: content/browser/download/base_file.cc
diff --git a/content/browser/download/base_file.cc b/content/browser/download/base_file.cc
index 7593df8c1c52ed488ab3b19576b6e258ead7a45a..0662cdf2acc10e370cfa16329b3c333554001d48 100644
--- a/content/browser/download/base_file.cc
+++ b/content/browser/download/base_file.cc
@@ -55,10 +55,12 @@ bool BaseFile::Initialize(bool calculate_hash) {
   if (calculate_hash_)
     secure_hash_.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
 
-  if (!full_path_.empty() ||
-      download_util::CreateTemporaryFileForDownload(&full_path_))
-    return Open();
-  return false;
+  FilePath save_path =
+    download_util::GetDefaultDownloadDirectoryFromPathService();
+  if (full_path_.empty() &&
+      !file_util::CreateTemporaryFileInDir(save_path, &full_path_))
+    return false;
+  return Open();
 }
 
 bool BaseFile::AppendDataToFile(const char* data, size_t data_len) {