Disable flaky test

Bug: 853283
Change-Id: I67cd9784a6b4fb7fa3b6279c590b9e4f42ba2e0f
Reviewed-on: https://chromium-review.googlesource.com/1104383Reviewed-by: Maks Orlovich <morlovich@chromium.org>
Commit-Queue: Josh Karlin <jkarlin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567996}

net/disk_cache/backend_unittest.cc

@@ -4114,7 +4114,8 @@ TEST_F(DiskCacheBackendTest, SimpleCacheEnumerationDestruction) {
 }
 
 // Verify that tasks run in priority order when the experiment is enabled.
-TEST_F(DiskCacheBackendTest, SimpleCachePrioritizedEntryOrder) {
+// Test has races, disabling until fixed: https://crbug.com/853283
+TEST_F(DiskCacheBackendTest, DISABLE_SimpleCachePrioritizedEntryOrder) {
   base::test::ScopedFeatureList scoped_feature_list;
   scoped_feature_list.InitAndEnableFeature(
       disk_cache::SimpleBackendImpl::kPrioritizedSimpleCacheTasks);