Relanding this patch with the compile fix for Visual studio 2005. The compile...

chrome/browser/plugin_download_helper.h

+// Copyright (c) 2010 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.
+
+#ifndef CHROME_BROWSER_PLUGIN_DOWNLOAD_HELPER_H_
+#define CHROME_BROWSER_PLUGIN_DOWNLOAD_HELPER_H_
+#pragma once
+
+#include <string>
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include "base/file_path.h"
+#include "gfx/native_widget_types.h"
+#include "net/base/file_stream.h"
+#include "net/url_request/url_request.h"
+
+// The PluginDownloadUrlHelper is used to handle one download URL request
+// from the plugin. Each download request is handled by a new instance
+// of this class.
+class PluginDownloadUrlHelper : public URLRequest::Delegate {
+  static const int kDownloadFileBufferSize = 32768;
+ public:
+  // The delegate receives notification about the status of downloads
+  // initiated.
+  class DownloadDelegate {
+   public:
+    virtual ~DownloadDelegate() {}
+
+    virtual void OnDownloadCompleted(const FilePath& download_path,
+                                     bool success) {}
+  };
+
+  PluginDownloadUrlHelper(const std::string& download_url,
+                          int source_pid, gfx::NativeWindow caller_window,
+                          PluginDownloadUrlHelper::DownloadDelegate* delegate);
+  ~PluginDownloadUrlHelper();
+
+  void InitiateDownload(URLRequestContext* request_context);
+
+  // URLRequest::Delegate
+  virtual void OnAuthRequired(URLRequest* request,
+                              net::AuthChallengeInfo* auth_info);
+  virtual void OnSSLCertificateError(URLRequest* request,
+                                     int cert_error,
+                                     net::X509Certificate* cert);
+  virtual void OnResponseStarted(URLRequest* request);
+  virtual void OnReadCompleted(URLRequest* request, int bytes_read);
+
+  void OnDownloadCompleted(URLRequest* request);
+
+ protected:
+  void DownloadCompletedHelper(bool success);
+
+  // The download file request initiated by the plugin.
+  URLRequest* download_file_request_;
+  // Handle to the downloaded file.
+  scoped_ptr<net::FileStream> download_file_;
+  // The full path of the downloaded file.
+  FilePath download_file_path_;
+  // The buffer passed off to URLRequest::Read.
+  scoped_refptr<net::IOBuffer> download_file_buffer_;
+  // TODO(port): this comment doesn't describe the situation on Posix.
+  // The window handle for sending the WM_COPYDATA notification,
+  // indicating that the download completed.
+  gfx::NativeWindow download_file_caller_window_;
+
+  std::string download_url_;
+  int download_source_child_unique_id_;
+
+  PluginDownloadUrlHelper::DownloadDelegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginDownloadUrlHelper);
+};
+
+#endif  // OS_WIN
+
+#endif  // CHROME_BROWSER_PLUGIN_DOWNLOAD_HELPER_H_
+
+