Disable TaskManagerBrowserTest.ShutdownWhileOpen on ChromeOS, it actually crashes.

chrome/browser/task_manager/task_manager_browsertest.cc

Index: chrome/browser/task_manager/task_manager_browsertest.cc
diff --git a/chrome/browser/task_manager/task_manager_browsertest.cc b/chrome/browser/task_manager/task_manager_browsertest.cc
index ab95d3ce9d853430af82f835c7959f5aa12f8fac..76bb777099babbdea8b878e7e05c3b72d0d36b84 100644
--- a/chrome/browser/task_manager/task_manager_browsertest.cc
+++ b/chrome/browser/task_manager/task_manager_browsertest.cc
@@ -56,10 +56,10 @@ class TaskManagerBrowserTest : public ExtensionBrowserTest {
   }
 };
 
-// Flaky on ChromeOS (triggers pure virtual function call), see
+// Flaky crashes on ChromeOS (triggers pure virtual function call), see
 // http://crbug.com/92297 for details
 #if defined(OS_CHROMEOS)
-#define MAYBE_ShutdownWhileOpen FLAKY_ShutdownWhileOpen
+#define MAYBE_ShutdownWhileOpen DISABLED_ShutdownWhileOpen
 #else
 #define MAYBE_ShutdownWhileOpen ShutdownWhileOpen
 #endif