Add multiplexing of message pipes in the new EDK.

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 "base/memory/ref_counted.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/public/c/system/core.h"
 #include "mojo/public/c/system/types.h"
 
 namespace mojo {
 namespace edk {
 namespace {
 
 const MojoHandleSignals kAllSignals = MOJO_HANDLE_SIGNAL_READABLE |
                                       MOJO_HANDLE_SIGNAL_WRITABLE |
                                       MOJO_HANDLE_SIGNAL_PEER_CLOSED;
 static const char kHelloWorld[] = "hello world";
 
-class MessagePipeTest : public test::MojoSystemTest {
+class MessagePipeTest : public testing::Test {
  public:
   MessagePipeTest() {
     CHECK_EQ(MOJO_RESULT_OK, MojoCreateMessagePipe(nullptr, &pipe0_, &pipe1_));
   }
 
   ~MessagePipeTest() override {
     if (pipe0_ != MOJO_HANDLE_INVALID)
       CHECK_EQ(MOJO_RESULT_OK, MojoClose(pipe0_));
     if (pipe1_ != MOJO_HANDLE_INVALID)
       CHECK_EQ(MOJO_RESULT_OK, MojoClose(pipe1_));
@@ skipping 370 matching lines @@
   ASSERT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
             MojoWait(pipe1_, MOJO_HANDLE_SIGNAL_READABLE,
                      MOJO_DEADLINE_INDEFINITE, &hss));
   ASSERT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
   ASSERT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
 }
 
 }  // namespace
 }  // namespace edk
 }  // namespace mojo