Use FilterContext to allow filters to access URLRequestJob data...

chrome/browser/automation/url_request_mock_http_job.h

 // Copyright (c) 2006-2008 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.
 //
 // A URLRequestJob class that pulls the content and http headers from disk.
 
 #ifndef CHROME_BROWSER_AUTOMATION_URL_REQUEST_MOCK_HTTP_JOB_H__
 #define CHROME_BROWSER_AUTOMATION_URL_REQUEST_MOCK_HTTP_JOB_H__
 
+#include <string>
+
 #include "net/url_request/url_request_file_job.h"
 
 class URLRequestMockHTTPJob : public URLRequestFileJob {
  public:
   URLRequestMockHTTPJob(URLRequest* request, const FilePath& file_path);
   virtual ~URLRequestMockHTTPJob() { }
 
-  virtual bool GetMimeType(std::string* mime_type);
+  virtual bool GetMimeType(std::string* mime_type) const;
   virtual bool GetCharset(std::string* charset);
   virtual void GetResponseInfo(net::HttpResponseInfo* info);
 
   static URLRequest::ProtocolFactory Factory;
 
   // For UI tests: adds the testing URLs to the URLRequestFilter.
   static void AddUITestUrls(const std::wstring& base_path);
 
   // Given the path to a file relative to base_path_, construct a mock URL.
   static GURL GetMockUrl(const std::wstring& path);
 
  private:
+  void GetResponseInfoConst(net::HttpResponseInfo* info) const;
+
   // This is the file path leading to the root of the directory to use as the
   // root of the http server.
   static std::wstring base_path_;
 };
 
 # endif  // CHROME_BROWSER_AUTOMATION_URL_REQUEST_MOCK_HTTP_JOB_H__