Mojo EDK: Work around Nexus 9 hardware bug

mojo/edk/system/message_pipe_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 #include <string.h>
 
 #include "base/memory/ref_counted.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/edk/test/mojo_test_base.h"
@@ skipping 688 matching lines @@
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, MojoClose(b));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, MojoClose(c));
 
   EXPECT_EQ(kTestMessage, ReadMessage(d));
   EXPECT_EQ(MOJO_RESULT_OK, MojoWait(d, MOJO_HANDLE_SIGNAL_PEER_CLOSED,
                                      MOJO_DEADLINE_INDEFINITE, nullptr));
 
   EXPECT_EQ(MOJO_RESULT_OK, MojoClose(d));
 }
 
+TEST_F(MessagePipeTest, ClosePipesStressTest) {
+  // Stress test to exercise https://crbug.com/665869.
+  const size_t kNumPipes = 100000;
+  for (size_t i = 0; i < kNumPipes; ++i) {
+    MojoHandle a, b;
+    CreateMessagePipe(&a, &b);
+    MojoClose(a);
+    MojoClose(b);
+  }
+}
+
 }  // namespace
 }  // namespace edk
 }  // namespace mojo