Adds imageWriterPrivate support for Windows

chrome/browser/extensions/api/image_writer_private/write_from_url_operation.cc

 // Copyright 2013 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/threading/worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/image_writer_private/error_messages.h"
 #include "chrome/browser/extensions/api/image_writer_private/operation_manager.h"
 #include "chrome/browser/extensions/api/image_writer_private/write_from_url_operation.h"
@@ skipping 148 matching lines @@
 
   } else if (download->GetState() == content::DownloadItem::INTERRUPTED) {
     Error(error::kDownloadInterrupted);
   } else if (download->GetState() == content::DownloadItem::CANCELLED) {
     Error(error::kDownloadCancelled);
   }
 }
 
 void WriteFromUrlOperation::DownloadComplete() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  DVLOG(1) << "Download complete.";
+  DVLOG(0) << "Download complete: " << download_path_.value();
 
   SetProgress(kProgressComplete);
 
   VerifyDownloadStart();
 }
 
 void WriteFromUrlOperation::DownloadCleanUp() {
   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     BrowserThread::PostTask(
         BrowserThread::UI,
@@ skipping 70 matching lines @@
   DVLOG(1) << "Download verification complete.";
 
   SetProgress(kProgressComplete);
 
   scoped_ptr<base::FilePath> download_path(new base::FilePath(download_path_));
   UnzipStart(download_path.Pass());
 }
 
 } // namespace image_writer
 } // namespace extensions