Mark test_user_timing_measure_navigation_timing.htm as flaky

BUG=395127
TBR=tonyg@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/398423005

git-svn-id: svn://svn.chromium.org/blink/trunk@178445 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/FlakyTests

@@ -1009,10 +1009,7 @@ Bug(gardener) [ Debug Win7 ] http/tests/w3c/webperf/approved/UserTiming/test_use
 Bug(gardener) [ Release XP ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_mark.htm [ Failure Pass ]
 Bug(gardener) [ Debug Linux ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure.htm [ Failure Pass ]
 Bug(gardener) [ Debug Win7 ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure.htm [ Failure Pass ]
-Bug(gardener) [ Debug Linux ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
-Bug(gardener) [ Debug SnowLeopard ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
-Bug(gardener) [ Debug Win7 ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
-Bug(gardener) [ Release XP ] http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
+crbug.com/395127 http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
 Bug(gardener) [ Release XP ] http/tests/w3c/webperf/submission/Intel/resource-timing/test_resource_timing_cross_origin_redirect_with_timing_allow_origin.html [ Failure Pass ]
 Bug(gardener) [ Debug SnowLeopard ] http/tests/w3c/webperf/submission/Intel/user-timing/test_user_timing_clearMarks.html [ Failure Pass ]
 Bug(gardener) [ Debug Win7 ] http/tests/webfont/webfont-performance-duration.html [ Failure Pass ]