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

chrome/common/net/url_request_intercept_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.
 
 #ifndef CHROME_COMMON_NET_URL_REQUEST_INTERCEPT_JOB_H_
 #define CHROME_COMMON_NET_URL_REQUEST_INTERCEPT_JOB_H_
 
+#include <string>
+
+#include "base/scoped_ptr.h"
 #include "net/url_request/url_request_job.h"
 #include "chrome/browser/chrome_plugin_host.h"
 #include "chrome/common/chrome_plugin_api.h"
 #include "chrome/common/chrome_plugin_util.h"
 #include "chrome/common/notification_observer.h"
 
 class ChromePluginLib;
 class URLRequest;
 
 // A request job that handles network requests intercepted by a Chrome plugin.
 class URLRequestInterceptJob
     : public URLRequestJob, public NotificationObserver {
  public:
   static URLRequestInterceptJob* FromCPRequest(CPRequest* request) {
     return ScopableCPRequest::GetData<URLRequestInterceptJob*>(request);
   }
 
   URLRequestInterceptJob(URLRequest* request, ChromePluginLib* plugin,
                          ScopableCPRequest* cprequest);
   virtual ~URLRequestInterceptJob();
 
   // Plugin callbacks.
   void OnStartCompleted(int result);
   void OnReadCompleted(int bytes_read);
 
   // URLRequestJob
   virtual void Start();
   virtual void Kill();
   virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read);
-  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);
   virtual int GetResponseCode();
   virtual bool GetContentEncoding(std::string* encoding_type);
   virtual bool IsRedirectResponse(GURL* location, int* http_status_code);
 
   // NotificationObserver
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
  private:
   void StartAsync();
   void DetachPlugin();
 
   scoped_ptr<ScopableCPRequest> cprequest_;
   ChromePluginLib* plugin_;
   bool got_headers_;
   net::IOBuffer* read_buffer_;
   int read_buffer_size_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestInterceptJob);
 };
 
 #endif  // CHROME_COMMON_NET_URL_REQUEST_INTERCEPT_JOB_H_