Disable BackForwardCacheBrowserTestWithFileSystemAPISupported.CacheWithFileSystemAPI due to flakes.

Bug: 1158872
Tbr: hajimehoshi@chromium.org
Change-Id: Id726b5eddcf0864346f0ee411763653cbbbe842d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2593570Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837172}

content/browser/back_forward_cache_browsertest.cc

@@ -8854,7 +8854,7 @@ class BackForwardCacheBrowserTestWithFileSystemAPISupported
 };
 
 IN_PROC_BROWSER_TEST_F(BackForwardCacheBrowserTestWithFileSystemAPISupported,
-                       CacheWithFileSystemAPI) {
+                       DISABLED_CacheWithFileSystemAPI) {
   ASSERT_TRUE(embedded_test_server()->Start());
   GURL url_a(embedded_test_server()->GetURL("/fileapi/request_test.html"));
   GURL url_b(embedded_test_server()->GetURL("b.com", "/title1.html"));