Convert Pass()→std::move() in //chrome

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 d9ff901a3fa669ad9c4ea088914dc6f70475bc1b..7a9a721b5fb33aa08b0a9d11d6df51ebe21b66fb 100644
--- a/chrome/browser/download/download_test_file_activity_observer.cc
+++ b/chrome/browser/download/download_test_file_activity_observer.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/download/download_test_file_activity_observer.h"
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ -75,7 +77,7 @@ DownloadTestFileActivityObserver::DownloadTestFileActivityObserver(
       new MockDownloadManagerDelegate(profile));
   test_delegate_ = mock_delegate->GetWeakPtr();
   DownloadServiceFactory::GetForBrowserContext(profile)
-      ->SetDownloadManagerDelegateForTesting(mock_delegate.Pass());
+      ->SetDownloadManagerDelegateForTesting(std::move(mock_delegate));
 }
 
 DownloadTestFileActivityObserver::~DownloadTestFileActivityObserver() {