[downloads] Move platform specific code out of DownloadTargetDeterminer.

chrome/browser/download/download_test_file_activity_observer.cc

Index: chrome/browser/download/download_test_file_activity_observer.cc
diff --git a/chrome/browser/download/download_test_file_activity_observer.cc b/chrome/browser/download/download_test_file_activity_observer.cc
index 5039abfbaee2f5c5ee548891b625b2e988dbfdee..642866b396fba55107a7c41f2818c4f729d39c06 100644
--- a/chrome/browser/download/download_test_file_activity_observer.cc
+++ b/chrome/browser/download/download_test_file_activity_observer.cc
@@ -52,15 +52,17 @@ class DownloadTestFileActivityObserver::MockDownloadManagerDelegate
   }
 
  protected:
-  void PromptUserForDownloadPath(
-      content::DownloadItem* item,
-      const base::FilePath& suggested_path,
-      const FileSelectedCallback& callback) override {
+  void RequestConfirmation(content::DownloadItem* item,
+                           const base::FilePath& suggested_path,
+                           DownloadConfirmationReason reason,
+                           const FileSelectedCallback& callback) override {
     file_chooser_displayed_ = true;
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
-        base::Bind(callback, (file_chooser_enabled_ ? suggested_path
-                                                    : base::FilePath())));
+        base::Bind(callback, (file_chooser_enabled_
+                                  ? DownloadConfirmationResult::CONFIRMED
+                                  : DownloadConfirmationResult::CANCELED),
+                   suggested_path));
   }
 
   void OpenDownload(content::DownloadItem* item) override {}