[Offline pages] Refactor URL conversions from TabAndroid

components/offline_pages/offline_page_test_archiver.cc

 // Copyright 2015 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 "components/offline_pages/offline_page_test_archiver.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 25 matching lines @@
   create_archive_called_ = true;
   callback_ = callback;
   archives_dir_ = archives_dir;
   if (!delayed_)
     CompleteCreateArchive();
 }
 
 void OfflinePageTestArchiver::CompleteCreateArchive() {
   DCHECK(!callback_.is_null());
   base::FilePath archive_path;
-  ASSERT_TRUE(base::CreateTemporaryFileInDir(archives_dir_, &archive_path));
+  if (filename_.empty()) {
+    ASSERT_TRUE(base::CreateTemporaryFileInDir(archives_dir_, &archive_path));
+  } else {
+    archive_path = archives_dir_.Append(filename_);
+    // This step ensures the file is created and closed immediately.
+    base::File file(archive_path, base::File::FLAG_OPEN_ALWAYS);
+  }
   observer_->SetLastPathCreatedByArchiver(archive_path);
   task_runner_->PostTask(FROM_HERE, base::Bind(callback_, this, result_, url_,
                                                archive_path, size_to_report_));
 }
 
 }  // namespace offline_pages