Switch to use download GUID to indentify download items

content/public/browser/android/download_controller_android.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_item.h"
@@ skipping 23 matching lines @@
   // request with authentication or a POST request. Notifies the embedding
   // app about the download. Should be called on the UI thread.
   virtual void OnDownloadStarted(DownloadItem* download_item) = 0;
 
   // Called when a download is initiated by context menu.
   virtual void StartContextMenuDownload(
       const ContextMenuParams& params, WebContents* web_contents,
       bool is_link, const std::string& extra_headers) = 0;
 
   // Called when a dangerous download item is verified or rejected.
-  virtual void DangerousDownloadValidated(
-      WebContents* web_contents, int download_id, bool accept) = 0;
+  virtual void DangerousDownloadValidated(WebContents* web_contents,
+                                          const std::string& download_guid,
+                                          bool accept) = 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(
       WebContents* web_contents,
       const AcquireFileAccessPermissionCallback& callback) = 0;
 
   // Called by unit test to approve or disapprove file access request.
   virtual void SetApproveFileAccessRequestForTesting(bool approve) {};
 
   // Called to set the default download file name if it cannot be resolved
   // from url and content disposition
   virtual void SetDefaultDownloadFileName(const std::string& file_name) {}
 
  protected:
   ~DownloadControllerAndroid() override {};
   static DownloadControllerAndroid* download_controller_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_H_