Disable the flaky AntiVirusMetricsProviderTest.GetMetricsFullName test

This test has been failing consistently for months on the official bots.

Bug: 682286
Change-Id: Ie13609eb0b806ad412d5569c73153d8e1eb4a192
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300240
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Auto-Submit: Sébastien Marchand <sebmarchand@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788616}

chrome/browser/metrics/antivirus_metrics_provider_win_unittest.cc

@@ -115,7 +115,8 @@ class AntiVirusMetricsProviderTest : public ::testing::TestWithParam<bool> {
   DISALLOW_COPY_AND_ASSIGN(AntiVirusMetricsProviderTest);
 };
 
-TEST_P(AntiVirusMetricsProviderTest, GetMetricsFullName) {
+// TODO(crbug.com/682286): Flaky on Windows 10.
+TEST_P(AntiVirusMetricsProviderTest, DISABLED_GetMetricsFullName) {
   base::ScopedAllowBlockingForTesting scoped_allow_blocking_;
 
   ASSERT_TRUE(thread_checker_.CalledOnValidThread());