Disable SecurityExploitBrowserTest.AttemptDuplicateRenderWidgetHost.

SecurityExploitBrowserTest.AttemptDuplicateRenderWidgetHost is flaky
on all platorms.

TBR=boliu@chromium.org

Bug: 939338
Change-Id: I21f13d8651b52647f61a0bb8f92d943ff96e7def
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1508894Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638643}

content/browser/security_exploit_browsertest.cc

@@ -383,8 +383,9 @@ IN_PROC_BROWSER_TEST_F(SecurityExploitBrowserTest,
 // This is a test for crbug.com/312016. It tries to create two RenderWidgetHosts
 // with the same process and routing ids, which causes a collision. It is almost
 // identical to the AttemptDuplicateRenderViewHost test case.
+// Crashes on all platforms.  http://crbug.com/939338
 IN_PROC_BROWSER_TEST_F(SecurityExploitBrowserTest,
-                       AttemptDuplicateRenderWidgetHost) {
+                       DISABLED_AttemptDuplicateRenderWidgetHost) {
   int duplicate_routing_id = MSG_ROUTING_NONE;
   RenderFrameHostImpl* pending_rfh =
       PrepareToDuplicateHosts(shell(), &duplicate_routing_id);