Disabled test DumpAccessibilityEventsTest.DeleteSubtree.

Has been failing on Linux MSan since it was introduced in r683785 (but
reverting that would introduce a new crash, so disabling the test).

Bug: 990691
Change-Id: I95513e01a39ebc66fdbac349406aca067e320ec5
Tbr: aboxhall@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1734832Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Commit-Queue: Matt Giuca <mgiuca@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683922}

content/browser/accessibility/dump_accessibility_events_browsertest.cc

@@ -797,7 +797,7 @@ IN_PROC_BROWSER_TEST_P(DumpAccessibilityEventsTest,
   RunEventTest(FILE_PATH_LITERAL("select-selected-add-remove.html"));
 }
 
-IN_PROC_BROWSER_TEST_P(DumpAccessibilityEventsTest, DeleteSubtree) {
+IN_PROC_BROWSER_TEST_P(DumpAccessibilityEventsTest, DISABLED_DeleteSubtree) {
   RunEventTest(FILE_PATH_LITERAL("delete-subtree.html"));
 }