Media Galleries API: Fix CopyTo test flaky timeout on Windows.

chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc

Index: chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
diff --git a/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc b/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
index f67b8cf5a5454f6ffb66b9cd50dc32460c308ba0..d89bb6cc6070b25d657d448e2bfa71c967d69ce2 100644
--- a/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
+++ b/chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc
@@ -133,9 +133,8 @@ IN_PROC_BROWSER_TEST_F(MediaGalleriesPlatformAppBrowserTest,
       kTestGalleries, media_directories.num_galleries())));
 }
 
-// Flakily times out: http://crbug.com/268481
 IN_PROC_BROWSER_TEST_F(MediaGalleriesPlatformAppBrowserTest,
-                       DISABLED_MediaGalleriesCopyTo) {
+                       MediaGalleriesCopyTo) {
   chrome::EnsureMediaDirectoriesExists media_directories;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());