[File Manager] Better Google Drive promo layout in Open/Save dialogs

chrome/browser/resources/file_manager/js/mock_chrome.js

Index: chrome/browser/resources/file_manager/js/mock_chrome.js
diff --git a/chrome/browser/resources/file_manager/js/mock_chrome.js b/chrome/browser/resources/file_manager/js/mock_chrome.js
index b6c0362d2615c6e16786ff6729e3e94023404ed8..23b0c354267001a0e04f57bd63c3c2cd3435c329 100644
--- a/chrome/browser/resources/file_manager/js/mock_chrome.js
+++ b/chrome/browser/resources/file_manager/js/mock_chrome.js
@@ -237,14 +237,16 @@ chrome.fileBrowserPrivate = {
             mountPath: path,
             type: type
           });
-          chrome.fileBrowserPrivate.onMountCompleted.notify({
-            eventType: 'mount',
-            status: 'success',
-            mountType: type,
-            authToken: 'dummy',
-            mountPath: path,
-            sourceUrl: source
-          });
+          setTimeout(function() {
+            chrome.fileBrowserPrivate.onMountCompleted.notify({
+              eventType: 'mount',
+              status: 'success',
+              mountType: type,
+              authToken: 'dummy',
+              mountPath: path,
+              sourceUrl: source
+            });
+          }, 1000);
           console.log('Created a mock mount at ' + path);
         },
         util.flog('Error creating a mock mount at ' + path));