Refactor BaseFile class to support sparse files

content/browser/download/base_file_win_unittest.cc

 // Copyright 2016 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 "content/browser/download/base_file.h"
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ skipping 54 matching lines @@
           target_directory.GetPath().Append(relative_path));
     }
 
     SCOPED_TRACE(::testing::Message() << "Source URL: " << url.spec()
                                       << " Referrer: " << test_case.referrer);
 
     BaseFile base_file((net::NetLogWithSource()));
     ASSERT_EQ(DOWNLOAD_INTERRUPT_REASON_NONE,
               base_file.Initialize(base::FilePath(), target_directory.GetPath(),
                                    base::File(), 0, std::string(),
-                                   std::unique_ptr<crypto::SecureHash>()));
+                                   std::unique_ptr<crypto::SecureHash>(),
+                                   false));
     ASSERT_FALSE(base_file.full_path().empty());
     ASSERT_EQ(DOWNLOAD_INTERRUPT_REASON_NONE,
               base_file.Rename(
                   target_directory.GetPath().AppendASCII("test_file.doc")));
     ASSERT_EQ(DOWNLOAD_INTERRUPT_REASON_NONE,
               base_file.AnnotateWithSourceInformation(
                   "7B2CEE7C-DC81-4160-86F1-9C968597118F", url, referrer));
     base_file.Detach();
     base_file.Finish();
 
@@ skipping 20 matching lines @@
                      << " Referrer:" << test_case.referrer
                      << " Annotation:" << std::endl
                      << zone_identifier;
       }
     }
     base::DeleteFile(path, false);
   }
 }
 
 }  // namespace content