Linux: work around the fact that the download dialog has not been ported....

chrome/browser/browser_process.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.
 
 // This interfaces is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 112 matching lines @@
 
   virtual printing::PrintJobManager* print_job_manager() = 0;
 
   virtual GoogleURLTracker* google_url_tracker() = 0;
 
   // Returns the locale used by the application.
   virtual const std::wstring& GetApplicationLocale() = 0;
 
   virtual MemoryModel memory_model() = 0;
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_LINUX)
   DownloadRequestManager* download_request_manager();
 #endif
 
   // Returns an event that is signaled when the browser shutdown.
   virtual base::WaitableEvent* shutdown_event() = 0;
 
   // Returns a reference to the user-data-dir based profiles vector.
   std::vector<std::wstring>& user_data_dir_profiles() {
     return user_data_dir_profiles_;
   }
 
  private:
   // User-data-dir based profiles.
   std::vector<std::wstring> user_data_dir_profiles_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_