Layout Test http/tests/cache/disk-cache/disk-cache-validation-back-navigation-policy.html is still flaky.

[Matt Lewis]

http/tests/cache/disk-cache/disk-cache-validation-back-navigation-policy.html is still a flaky failure on macOS. It has previously been marked as a flaky timeout on macOS based on bug https://bugs.webkit.org/show_bug.cgi?id=149087

According to the flakiness dashboard the test is now a flaky failure:
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fcache%2Fdisk-cache%2Fdisk-cache-validation-back-navigation-policy.html


Diff:
--- /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/http/tests/cache/disk-cache/disk-cache-validation-back-navigation-policy-expected.txt
+++ /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/http/tests/cache/disk-cache/disk-cache-validation-back-navigation-policy-actual.txt
@@ -612,7 +612,7 @@
 response source: Disk cache
 
 response headers: {"Cache-control":"max-age=100, must-revalidate","ETag":"match"}
-response source: Disk cache
+response source: Network
 
 response headers: {"Cache-control":"no-store, must-revalidate","ETag":"match"}
 response source: Network

[Matt Lewis]

Marked as flaky in:
https://trac.webkit.org/changeset/224936/webkit

[Truitt Savell]

This test has recently become a flakey timeout on Mac platforms.

History:
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fcache%2Fdisk-cache%2Fdisk-cache-validation-back-navigation-policy.htmlhttp/tests/cache/disk-cache/disk-cache-validation-back-navigation-policy.html

[Ben Schwartz]

*** This bug has been marked as a duplicate of bug 172662 ***