taskmanager: disables TaskManagerOOPIFBrowserTest.OrderingOfDependentRows

It's flaky.

BUG=1113972
TEST=test only change
TBR=afakhry@chromium.org

Change-Id: If2b41231cd9133f03b00f6388f7a5c666a24f3ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2347950Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796650}

chrome/browser/task_manager/task_manager_browsertest.cc

@@ -1276,7 +1276,9 @@ IN_PROC_BROWSER_TEST_P(TaskManagerOOPIFBrowserTest,
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, MatchAnySubframe()));
 }
 
-IN_PROC_BROWSER_TEST_P(TaskManagerOOPIFBrowserTest, OrderingOfDependentRows) {
+// TODO(https://crbug.com/1113972): disabled as test is flaky.
+IN_PROC_BROWSER_TEST_P(TaskManagerOOPIFBrowserTest,
+                       DISABLED_OrderingOfDependentRows) {
   ShowTaskManager();
 
   GURL a_with_frames(embedded_test_server()->GetURL(