Adds imageWriterPrivate support for Windows

chrome/browser/extensions/api/image_writer_private/write_from_file_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 "chrome/browser/extensions/api/image_writer_private/error_messages.h"
 #include "chrome/browser/extensions/api/image_writer_private/write_from_file_operation.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace extensions {
@@ skipping 12 matching lines @@
 
 WriteFromFileOperation::~WriteFromFileOperation() {}
 
 void WriteFromFileOperation::StartImpl() {
   if (!base::PathExists(image_path_) || base::DirectoryExists(image_path_)) {
     DLOG(ERROR) << "Source must exist and not be a directory.";
     Error(error::kImageInvalid);
     return;
   }
 
-  Unzip(base::Bind(
-      &WriteFromFileOperation::Write,
-      this,
-      base::Bind(&WriteFromFileOperation::VerifyWrite,
-                 this,
-                 base::Bind(&WriteFromFileOperation::Finish, this))));
+  BrowserThread::PostTask(
+      BrowserThread::FILE,
+      FROM_HERE,
+      base::Bind(
+          &WriteFromFileOperation::Unzip,
+          this,
+          base::Bind(
+              &WriteFromFileOperation::Write,
+              this,
+              base::Bind(&WriteFromFileOperation::VerifyWrite,
+                         this,
+                         base::Bind(&WriteFromFileOperation::Finish, this)))));
 }
 
 }  // namespace image_writer
 }  // namespace extensions