[MemSheriff] Disable two tests which are flaky by design.

third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc

Index: third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc
diff --git a/third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc b/third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc
index b5562b00ff7dadc65287cfa6f05c1e9399ff50e8..2f97b29adfed6d5c2cb88e4295b6f1cbdb6a1757 100644
--- a/third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc
+++ b/third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher_unittest.cc
@@ -340,13 +340,8 @@ TEST(MessagePipeDispatcherTest, BasicClosed) {
   }
 }
 
-#if defined(OS_WIN)
 // http://crbug.com/396386
-#define MAYBE_BasicThreaded DISABLED_BasicThreaded
-#else
-#define MAYBE_BasicThreaded BasicThreaded
-#endif
-TEST(MessagePipeDispatcherTest, MAYBE_BasicThreaded) {
+TEST(MessagePipeDispatcherTest, DISABLED_BasicThreaded) {
   test::Stopwatch stopwatch;
   int32_t buffer[1];
   const uint32_t kBufferSize = static_cast<uint32_t>(sizeof(buffer));