Switch to use download GUID to indentify download items

chrome/browser/android/download/mock_download_controller_android.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_android.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/thread_task_runner_handle.h"
 
@@ skipping 16 matching lines @@
     content::DownloadItem* download_item) {
 }
 
 void MockDownloadControllerAndroid::StartContextMenuDownload(
     const content::ContextMenuParams& params,
     content::WebContents* web_contents,
     bool is_link, const std::string& extra_headers) {
 }
 
 void MockDownloadControllerAndroid::DangerousDownloadValidated(
-    content::WebContents* web_contents, int download_id, bool accept) {
-}
+    content::WebContents* web_contents,
+    const std::string& download_guid,
+    bool accept) {}
 
 void MockDownloadControllerAndroid::AcquireFileAccessPermission(
     content::WebContents* web_contents,
     const DownloadControllerAndroid::AcquireFileAccessPermissionCallback& cb) {
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(cb, approve_file_access_request_));
 }
 
 void MockDownloadControllerAndroid::SetApproveFileAccessRequestForTesting(
     bool approve) {
   approve_file_access_request_ = approve;
 }
 
 }  // namespace android
 }  // namespace chrome