[Sheriff] Disable TabActivityWatcherTest.AllWindowMetricsArePopulated

Test is flaky on CrOS

TBR=reillyg@chromium.org

Bug: 1113702
Change-Id: I5fb0e53da39289d2f32be1f9ba0dd78a168fb2ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2341147Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795587}

chrome/browser/resource_coordinator/tab_activity_watcher_browsertest.cc

@@ -510,7 +510,14 @@ IN_PROC_BROWSER_TEST_F(TabActivityWatcherTestWithBackgroundLogEnabled,
 
 // Tests that all window metrics are logged with correct value which are
 // different from their default values in TabFeatures.
-IN_PROC_BROWSER_TEST_F(TabActivityWatcherTest, AllWindowMetricsArePopulated) {
+#if defined(OS_CHROMEOS)
+// TODO(http://crbug.com/1113702): flaky on ChromeOS.
+#define MAYBE_AllWindowMetricsArePopulated DISABLED_AllWindowMetricsArePopulated
+#else
+#define MAYBE_AllWindowMetricsArePopulated AllWindowMetricsArePopulated
+#endif
+IN_PROC_BROWSER_TEST_F(TabActivityWatcherTest,
+                       MAYBE_AllWindowMetricsArePopulated) {
   ui_test_utils::NavigateToURL(browser(), test_urls_[0]);
 
   // Adding a new foreground tab logs the previously active tab.