Switch to use download GUID to indentify download items

content/public/browser/android/download_controller_android.h

Index: content/public/browser/android/download_controller_android.h
diff --git a/content/public/browser/android/download_controller_android.h b/content/public/browser/android/download_controller_android.h
index e048afda0ccb5149055ac48ce5775d08650bf426..2ef664ec7b7e2cc3f2f3481d050c27f20d0824c4 100644
--- a/content/public/browser/android/download_controller_android.h
+++ b/content/public/browser/android/download_controller_android.h
@@ -41,8 +41,9 @@ class CONTENT_EXPORT DownloadControllerAndroid : public DownloadItem::Observer {
       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.