reintroduce InterceptDownloadResourceThrottle for some OMA DRM downloads

chrome/browser/android/download/mock_download_controller.cc

 // 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.
 
 #include "chrome/browser/android/download/mock_download_controller.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 
@@ skipping 21 matching lines @@
     const DownloadControllerBase::AcquireFileAccessPermissionCallback& cb) {
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(cb, approve_file_access_request_));
 }
 
 void MockDownloadController::SetApproveFileAccessRequestForTesting(
     bool approve) {
   approve_file_access_request_ = approve;
 }
 
+void MockDownloadController::CreateAndroidDownload(
+    const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
+    const DownloadInfo& info) {}
+
 }  // namespace android
 }  // namespace chrome