Exclude lots of tests from memory bots

chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc

Index: chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc
diff --git a/chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc b/chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc
index f5f6b5948a41b25d37129916372c4eb25f779d82..9aad594c2409bb7743a0ccccc78a6ce07d7d8b48 100644
--- a/chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc
+++ b/chrome/browser/extensions/api/braille_display_private/braille_display_private_apitest.cc
@@ -318,8 +318,14 @@ class BrailleDisplayPrivateAPIUserTest : public BrailleDisplayPrivateApiTest {
   }
 };
 
+// Flakily times out on ChromeOS MSAN bots. See https://crbug.com/592893.
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_KeyEventOnLockScreen DISABLED_KeyEventOnLockScreen
+#else
+#define MAYBE_KeyEventOnLockScreen KeyEventOnLockScreen
+#endif
 IN_PROC_BROWSER_TEST_F(BrailleDisplayPrivateAPIUserTest,
-                       KeyEventOnLockScreen) {
+                       MAYBE_KeyEventOnLockScreen) {
   scoped_ptr<ScreenLockerTester> tester(ScreenLocker::GetTester());
   // Log in.
   user_manager::UserManager::Get()->UserLoggedIn(