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

chrome/browser/download/download_file_unittest.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.
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_number_conversions.h"
 #include "chrome/browser/download/download_create_info.h"
 #include "chrome/browser/download/download_file.h"
@@ skipping 110 matching lines @@
     "CBF68BF10F8003DB86B31343AFAC8C7175BD03FB5FC905650F8C80AF087443A8";
 
 const int32 DownloadFileTest::kDummyDownloadId = 23;
 const int DownloadFileTest::kDummyChildId = 3;
 const int DownloadFileTest::kDummyRequestId = 67;
 
 // Rename the file before any data is downloaded, after some has, after it all
 // has, and after it's closed.
 TEST_F(DownloadFileTest, RenameFileFinal) {
   CreateDownloadFile(&download_file_, 0);
-  ASSERT_TRUE(download_file_->Initialize(true));
+  ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(download_file_->Initialize(true, temp_dir.path()));
   FilePath initial_path(download_file_->full_path());
   EXPECT_TRUE(file_util::PathExists(initial_path));
   FilePath path_1(initial_path.InsertBeforeExtensionASCII("_1"));
   FilePath path_2(initial_path.InsertBeforeExtensionASCII("_2"));
   FilePath path_3(initial_path.InsertBeforeExtensionASCII("_3"));
   FilePath path_4(initial_path.InsertBeforeExtensionASCII("_4"));
 
   // Rename the file before downloading any data.
   EXPECT_TRUE(download_file_->Rename(path_1));
   FilePath renamed_path = download_file_->full_path();
@@ skipping 41 matching lines @@
   // Check the files.
   EXPECT_FALSE(file_util::PathExists(path_3));
   EXPECT_TRUE(file_util::PathExists(path_4));
 
   // Check the hash.
   EXPECT_TRUE(download_file_->GetSha256Hash(&hash));
   EXPECT_EQ(kDataHash, base::HexEncode(hash.data(), hash.size()));
 
   DestroyDownloadFile(&download_file_, 0);
 }