Disable a flaky LoadingPredictorPrefetchBrowserTest.

In LoadingPredictorPrefetchBrowserTestWithBlockedLocalRequest, the
PrepareForPageLoadWithPredictionForPrefetch test case is flaky.

Bug: 1116599
Change-Id: I74e232f5628e3d412fa3239c8aca68435e27404b
Tbr: falken@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2357931Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798326}

chrome/browser/predictors/loading_predictor_browsertest.cc

@@ -2197,9 +2197,10 @@ class LoadingPredictorPrefetchBrowserTestWithBlockedLocalRequest
 };
 
 // Test that prefetches to local resources are blocked.
+// Disabled for being flaky. crbug.com/1116599
 IN_PROC_BROWSER_TEST_P(
     LoadingPredictorPrefetchBrowserTestWithBlockedLocalRequest,
-    PrepareForPageLoadWithPredictionForPrefetch) {
+    DISABLED_PrepareForPageLoadWithPredictionForPrefetch) {
   GURL url = embedded_test_server()->GetURL(
       "test.com", GetPathWithPortReplacement(kHtmlSubresourcesPath,
                                              embedded_test_server()->port()));