reintroduce InterceptDownloadResourceThrottle for some OMA DRM downloads

chrome/browser/android/download/mock_download_controller.h

 // Copyright (c) 2015 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_MOCK_DOWNLOAD_CONTROLLER_H_
 #define CHROME_BROWSER_ANDROID_DOWNLOAD_MOCK_DOWNLOAD_CONTROLLER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/singleton.h"
@@ skipping 16 matching lines @@
   // DownloadControllerBase implementation.
   void OnDownloadStarted(content::DownloadItem* download_item) override;
   void StartContextMenuDownload(
       const content::ContextMenuParams& params,
       content::WebContents* web_contents,
       bool is_link, const std::string& extra_headers) override;
   void AcquireFileAccessPermission(
       content::WebContents* web_contents,
       const AcquireFileAccessPermissionCallback& callback) override;
   void SetApproveFileAccessRequestForTesting(bool approve) override;
-
+  void CreateAndroidDownload(
+      const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
+      const DownloadInfo& info) override;
  private:
   bool approve_file_access_request_;
   DISALLOW_COPY_AND_ASSIGN(MockDownloadController);
 };
 
 }  // namespace android
 }  // namespace chrome
 
 
 #endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_MOCK_DOWNLOAD_CONTROLLER_H_