remove reliance on webcontents when requesting storage permission

chrome/browser/android/download/download_controller_base.h

 // Copyright 2016 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_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_BASE_H_
 #define CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_BASE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 54 matching lines @@
       content::WebContents* web_contents,
       bool is_link, const std::string& extra_headers) = 0;
 
   // Callback when user permission prompt finishes. Args: whether file access
   // permission is acquired.
   typedef base::Callback<void(bool)> AcquireFileAccessPermissionCallback;
 
   // Called to prompt the user for file access permission. When finished,
   // |callback| will be executed.
   virtual void AcquireFileAccessPermission(
-      content::WebContents* web_contents,
+      const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
       const AcquireFileAccessPermissionCallback& callback) = 0;
 
   // Called by unit test to approve or disapprove file access request.
   virtual void SetApproveFileAccessRequestForTesting(bool approve) {}
 
   // Starts a new download request with Android DownloadManager.
   virtual void CreateAndroidDownload(
       const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
       const DownloadInfo& info) = 0;
 
  protected:
   ~DownloadControllerBase() override {}
   static DownloadControllerBase* download_controller_;
 };
 
 #endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_CONTROLLER_BASE_H_