Disable test on Linux.

Also disabling NavigationWithBothLocalPredictionAndOptimizationHint on
Linux.

TBR=tbansal@chromium.org

Bug: 1060966
Change-Id: I4ee8348c8e0bed4248583327749552200bfa66f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107572Reviewed-by: James MacLean <wjmaclean@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751082}

chrome/browser/predictors/loading_predictor_browsertest.cc

@@ -1644,10 +1644,10 @@ IN_PROC_BROWSER_TEST_P(
   }
 }
 
+// crbug.com/1060966
 IN_PROC_BROWSER_TEST_P(
     LoadingPredictorBrowserTestWithOptimizationGuide,
-    DISABLE_ON_WIN_MAC_CHROMEOS(
-        NavigationWithBothLocalPredictionAndOptimizationHint)) {
+    DISABLED_NavigationWithBothLocalPredictionAndOptimizationHint) {
   base::HistogramTester histogram_tester;
 
   GURL url = embedded_test_server()->GetURL(