Move //mojo/{public, edk} underneath //third_party

mojo/edk/system/remote_message_pipe_unittest.cc

Index: mojo/edk/system/remote_message_pipe_unittest.cc
diff --git a/mojo/edk/system/remote_message_pipe_unittest.cc b/mojo/edk/system/remote_message_pipe_unittest.cc
deleted file mode 100644
index 1860c239e03e23663cfcb035fabe9adac3fcf5b8..0000000000000000000000000000000000000000
--- a/mojo/edk/system/remote_message_pipe_unittest.cc
+++ /dev/null
@@ -1,1376 +0,0 @@
-// Copyright 2014 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 <stdio.h>
-#include <string.h>
-
-#include <vector>
-
-#include "base/bind.h"
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/files/scoped_file.h"
-#include "base/files/scoped_temp_dir.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/message_loop/message_loop.h"
-#include "base/test/test_io_thread.h"
-#include "base/threading/platform_thread.h"  // For |Sleep()|.
-#include "build/build_config.h"              // TODO(vtl): Remove this.
-#include "mojo/edk/embedder/platform_channel_pair.h"
-#include "mojo/edk/embedder/platform_shared_buffer.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/edk/embedder/simple_platform_support.h"
-#include "mojo/edk/system/channel.h"
-#include "mojo/edk/system/channel_endpoint.h"
-#include "mojo/edk/system/channel_endpoint_id.h"
-#include "mojo/edk/system/incoming_endpoint.h"
-#include "mojo/edk/system/message_pipe.h"
-#include "mojo/edk/system/message_pipe_dispatcher.h"
-#include "mojo/edk/system/platform_handle_dispatcher.h"
-#include "mojo/edk/system/raw_channel.h"
-#include "mojo/edk/system/shared_buffer_dispatcher.h"
-#include "mojo/edk/system/test_utils.h"
-#include "mojo/edk/system/waiter.h"
-#include "mojo/edk/test/test_utils.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace mojo {
-namespace system {
-namespace {
-
-const MojoHandleSignals kAllSignals = MOJO_HANDLE_SIGNAL_READABLE |
-                                      MOJO_HANDLE_SIGNAL_WRITABLE |
-                                      MOJO_HANDLE_SIGNAL_PEER_CLOSED;
-
-class RemoteMessagePipeTest : public testing::Test {
- public:
-  RemoteMessagePipeTest() : io_thread_(base::TestIOThread::kAutoStart) {}
-  ~RemoteMessagePipeTest() override {}
-
-  void SetUp() override {
-    io_thread_.PostTaskAndWait(
-        FROM_HERE, base::Bind(&RemoteMessagePipeTest::SetUpOnIOThread,
-                              base::Unretained(this)));
-  }
-
-  void TearDown() override {
-    io_thread_.PostTaskAndWait(
-        FROM_HERE, base::Bind(&RemoteMessagePipeTest::TearDownOnIOThread,
-                              base::Unretained(this)));
-  }
-
- protected:
-  // This connects the two given |ChannelEndpoint|s. It assumes/requires that
-  // this is the bootstrap case (i.e., no other message pipes have ever been
-  // hosted on the channel).
-  void BootstrapChannelEndpoints(scoped_refptr<ChannelEndpoint> ep0,
-                                 scoped_refptr<ChannelEndpoint> ep1) {
-    io_thread_.PostTaskAndWait(
-        FROM_HERE,
-        base::Bind(&RemoteMessagePipeTest::BootstrapChannelEndpointsOnIOThread,
-                   base::Unretained(this), ep0, ep1));
-  }
-
-  // This bootstraps |ep| on |channels_[channel_index]|. It assumes/requires
-  // that this is the bootstrap case (i.e., no message pipes have ever been
-  // hosted on the channel). This returns *without* waiting.
-  void BootstrapChannelEndpointNoWait(unsigned channel_index,
-                                      scoped_refptr<ChannelEndpoint> ep) {
-    io_thread_.PostTask(
-        FROM_HERE,
-        base::Bind(&RemoteMessagePipeTest::BootstrapChannelEndpointOnIOThread,
-                   base::Unretained(this), channel_index, ep));
-  }
-
-  void RestoreInitialState() {
-    io_thread_.PostTaskAndWait(
-        FROM_HERE,
-        base::Bind(&RemoteMessagePipeTest::RestoreInitialStateOnIOThread,
-                   base::Unretained(this)));
-  }
-
-  embedder::PlatformSupport* platform_support() { return &platform_support_; }
-  base::TestIOThread* io_thread() { return &io_thread_; }
-  // Warning: It's up to the caller to ensure that the returned channel
-  // is/remains valid.
-  Channel* channels(size_t i) { return channels_[i].get(); }
-
- private:
-  void SetUpOnIOThread() {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-
-    embedder::PlatformChannelPair channel_pair;
-    platform_handles_[0] = channel_pair.PassServerHandle();
-    platform_handles_[1] = channel_pair.PassClientHandle();
-  }
-
-  void TearDownOnIOThread() {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-
-    if (channels_[0]) {
-      channels_[0]->Shutdown();
-      channels_[0] = nullptr;
-    }
-    if (channels_[1]) {
-      channels_[1]->Shutdown();
-      channels_[1] = nullptr;
-    }
-  }
-
-  void CreateAndInitChannel(unsigned channel_index) {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-    CHECK(channel_index == 0 || channel_index == 1);
-    CHECK(!channels_[channel_index]);
-
-    channels_[channel_index] = new Channel(&platform_support_);
-    channels_[channel_index]->Init(
-        RawChannel::Create(platform_handles_[channel_index].Pass()));
-  }
-
-  void BootstrapChannelEndpointsOnIOThread(scoped_refptr<ChannelEndpoint> ep0,
-                                           scoped_refptr<ChannelEndpoint> ep1) {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-
-    if (!channels_[0])
-      CreateAndInitChannel(0);
-    if (!channels_[1])
-      CreateAndInitChannel(1);
-
-    channels_[0]->SetBootstrapEndpoint(ep0);
-    channels_[1]->SetBootstrapEndpoint(ep1);
-  }
-
-  void BootstrapChannelEndpointOnIOThread(unsigned channel_index,
-                                          scoped_refptr<ChannelEndpoint> ep) {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-    CHECK(channel_index == 0 || channel_index == 1);
-
-    CreateAndInitChannel(channel_index);
-    channels_[channel_index]->SetBootstrapEndpoint(ep);
-  }
-
-  void RestoreInitialStateOnIOThread() {
-    CHECK_EQ(base::MessageLoop::current(), io_thread()->message_loop());
-
-    TearDownOnIOThread();
-    SetUpOnIOThread();
-  }
-
-  embedder::SimplePlatformSupport platform_support_;
-  base::TestIOThread io_thread_;
-  embedder::ScopedPlatformHandle platform_handles_[2];
-  scoped_refptr<Channel> channels_[2];
-
-  DISALLOW_COPY_AND_ASSIGN(RemoteMessagePipeTest);
-};
-
-TEST_F(RemoteMessagePipeTest, Basic) {
-  static const char kHello[] = "hello";
-  static const char kWorld[] = "world!!!1!!!1!";
-  char buffer[100] = {0};
-  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // Connect message pipes. MP 0, port 1 will be attached to channel 0 and
-  // connected to MP 1, port 0, which will be attached to channel 1. This leaves
-  // MP 0, port 0 and MP 1, port 1 as the "user-facing" endpoints.
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // Write in one direction: MP 0, port 0 -> ... -> MP 1, port 1.
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp1->ReadMessage(1, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kHello, buffer);
-
-  // Write in the other direction: MP 1, port 1 -> ... -> MP 0, port 0.
-
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp0->AddAwakable(0, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 456, nullptr));
-
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->WriteMessage(1, UserPointer<const void>(kWorld), sizeof(kWorld),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(456u, context);
-  hss = HandleSignalsState();
-  mp0->RemoveAwakable(0, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp0->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kWorld), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kWorld, buffer);
-
-  // Close MP 0, port 0.
-  mp0->Close(0);
-
-  // Try to wait for MP 1, port 1 to become readable. This will eventually fail
-  // when it realizes that MP 0, port 0 has been closed. (It may also fail
-  // immediately.)
-  waiter.Init();
-  hss = HandleSignalsState();
-  MojoResult result =
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 789, &hss);
-  if (result == MOJO_RESULT_OK) {
-    EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
-              waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-    EXPECT_EQ(789u, context);
-    hss = HandleSignalsState();
-    mp1->RemoveAwakable(1, &waiter, &hss);
-  }
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
-
-  // And MP 1, port 1.
-  mp1->Close(1);
-}
-
-TEST_F(RemoteMessagePipeTest, PeerClosed) {
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // Connect message pipes. MP 0, port 1 will be attached to channel 0 and
-  // connected to MP 1, port 0, which will be attached to channel 1. This leaves
-  // MP 0, port 0 and MP 1, port 1 as the "user-facing" endpoints.
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // Close MP 0, port 0.
-  mp0->Close(0);
-
-  // Try to wait for MP 1, port 1 to be signaled with peer closed.
-  waiter.Init();
-  hss = HandleSignalsState();
-  MojoResult result =
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_PEER_CLOSED, 101, &hss);
-  if (result == MOJO_RESULT_OK) {
-    EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-    EXPECT_EQ(101u, context);
-    hss = HandleSignalsState();
-    mp1->RemoveAwakable(1, &waiter, &hss);
-  }
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
-
-  // And MP 1, port 1.
-  mp1->Close(1);
-}
-
-TEST_F(RemoteMessagePipeTest, Multiplex) {
-  static const char kHello[] = "hello";
-  static const char kWorld[] = "world!!!1!!!1!";
-  char buffer[100] = {0};
-  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // Connect message pipes as in the |Basic| test.
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // Now put another message pipe on the channel.
-
-  // Do this by creating a message pipe (for the |channels(0)| side) and
-  // attaching and running it, yielding the remote ID. A message is then sent
-  // via |ep0| (i.e., sent using |mp0|, port 0) with this remote ID. Upon
-  // receiving this message, |PassIncomingMessagePipe()| is used to obtain the
-  // message pipe on the other side.
-  scoped_refptr<MessagePipe> mp2(MessagePipe::CreateLocalLocal());
-  ASSERT_TRUE(channels(0));
-  size_t max_endpoint_info_size;
-  size_t max_platform_handle_count;
-  mp2->StartSerialize(1, channels(0), &max_endpoint_info_size,
-                      &max_platform_handle_count);
-  EXPECT_GT(max_endpoint_info_size, 0u);
-  ASSERT_EQ(0u, max_platform_handle_count);
-  scoped_ptr<char[]> endpoint_info(new char[max_endpoint_info_size]);
-  size_t endpoint_info_size;
-  mp2->EndSerialize(1, channels(0), endpoint_info.get(), &endpoint_info_size,
-                    nullptr);
-  EXPECT_EQ(max_endpoint_info_size, endpoint_info_size);
-
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp0->WriteMessage(0, UserPointer<const void>(endpoint_info.get()),
-                              static_cast<uint32_t>(endpoint_info_size),
-                              nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  EXPECT_EQ(endpoint_info_size, channels(1)->GetSerializedEndpointSize());
-  scoped_ptr<char[]> received_endpoint_info(new char[endpoint_info_size]);
-  buffer_size = static_cast<uint32_t>(endpoint_info_size);
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp1->ReadMessage(1, UserPointer<void>(received_endpoint_info.get()),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(endpoint_info_size, static_cast<size_t>(buffer_size));
-  EXPECT_EQ(0, memcmp(received_endpoint_info.get(), endpoint_info.get(),
-                      endpoint_info_size));
-
-  // Warning: The local side of mp3 is port 0, not port 1.
-  scoped_refptr<IncomingEndpoint> incoming_endpoint =
-      channels(1)->DeserializeEndpoint(received_endpoint_info.get());
-  ASSERT_TRUE(incoming_endpoint);
-  scoped_refptr<MessagePipe> mp3 = incoming_endpoint->ConvertToMessagePipe();
-  ASSERT_TRUE(mp3);
-
-  // Write: MP 2, port 0 -> MP 3, port 1.
-
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp3->AddAwakable(0, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 789, nullptr));
-
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp2->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(789u, context);
-  hss = HandleSignalsState();
-  mp3->RemoveAwakable(0, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Make sure there's nothing on MP 0, port 0 or MP 1, port 1 or MP 2, port 0.
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp0->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp1->ReadMessage(1, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp2->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-
-  // Read from MP 3, port 1.
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp3->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kHello, buffer);
-
-  // Write: MP 0, port 0 -> MP 1, port 1 again.
-
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp0->WriteMessage(0, UserPointer<const void>(kWorld), sizeof(kWorld),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
-            hss.satisfiable_signals);
-
-  // Make sure there's nothing on the other ports.
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp0->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp2->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT,
-            mp3->ReadMessage(0, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-
-  buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp1->ReadMessage(1, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kWorld), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kWorld, buffer);
-
-  mp0->Close(0);
-  mp1->Close(1);
-  mp2->Close(0);
-  mp3->Close(0);
-}
-
-TEST_F(RemoteMessagePipeTest, CloseBeforeAttachAndRun) {
-  static const char kHello[] = "hello";
-  char buffer[100] = {0};
-  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // Connect message pipes. MP 0, port 1 will be attached to channel 0 and
-  // connected to MP 1, port 0, which will be attached to channel 1. This leaves
-  // MP 0, port 0 and MP 1, port 1 as the "user-facing" endpoints.
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-
-  // Write to MP 0, port 0.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // Close MP 0, port 0 before it's even been attached to the channel and run.
-  mp0->Close(0);
-
-  BootstrapChannelEndpointNoWait(0, ep0);
-
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  BootstrapChannelEndpointNoWait(1, ep1);
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  // Note: MP 1, port 1 should definitely should be readable, but it may or may
-  // not appear as writable (there's a race, and it may not have noticed that
-  // the other side was closed yet -- e.g., inserting a sleep here would make it
-  // much more likely to notice that it's no longer writable).
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
-  EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
-
-  // Read from MP 1, port 1.
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp1->ReadMessage(1, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kHello, buffer);
-
-  // And MP 1, port 1.
-  mp1->Close(1);
-}
-
-TEST_F(RemoteMessagePipeTest, CloseBeforeConnect) {
-  static const char kHello[] = "hello";
-  char buffer[100] = {0};
-  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // Connect message pipes. MP 0, port 1 will be attached to channel 0 and
-  // connected to MP 1, port 0, which will be attached to channel 1. This leaves
-  // MP 0, port 0 and MP 1, port 1 as the "user-facing" endpoints.
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-
-  // Write to MP 0, port 0.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                        nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  BootstrapChannelEndpointNoWait(0, ep0);
-
-  // Close MP 0, port 0 before channel 1 is even connected.
-  mp0->Close(0);
-
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  BootstrapChannelEndpointNoWait(1, ep1);
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  // Note: MP 1, port 1 should definitely should be readable, but it may or may
-  // not appear as writable (there's a race, and it may not have noticed that
-  // the other side was closed yet -- e.g., inserting a sleep here would make it
-  // much more likely to notice that it's no longer writable).
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_TRUE((hss.satisfied_signals & MOJO_HANDLE_SIGNAL_READABLE));
-  EXPECT_TRUE((hss.satisfiable_signals & MOJO_HANDLE_SIGNAL_READABLE));
-
-  // Read from MP 1, port 1.
-  EXPECT_EQ(MOJO_RESULT_OK,
-            mp1->ReadMessage(1, UserPointer<void>(buffer),
-                             MakeUserPointer(&buffer_size), nullptr, nullptr,
-                             MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(buffer_size));
-  EXPECT_STREQ(kHello, buffer);
-
-  // And MP 1, port 1.
-  mp1->Close(1);
-}
-
-TEST_F(RemoteMessagePipeTest, HandlePassing) {
-  static const char kHello[] = "hello";
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // We'll try to pass this dispatcher.
-  scoped_refptr<MessagePipeDispatcher> dispatcher(
-      new MessagePipeDispatcher(MessagePipeDispatcher::kDefaultCreateOptions));
-  scoped_refptr<MessagePipe> local_mp(MessagePipe::CreateLocalLocal());
-  dispatcher->Init(local_mp, 0);
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  char read_buffer[100] = {0};
-  uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  DispatcherVector read_dispatchers;
-  uint32_t read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->ReadMessage(1, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypeMessagePipe, read_dispatchers[0]->GetType());
-  dispatcher = static_cast<MessagePipeDispatcher*>(read_dispatchers[0].get());
-
-  // Add the waiter now, before it becomes readable to avoid a race.
-  waiter.Init();
-  ASSERT_EQ(MOJO_RESULT_OK,
-            dispatcher->AddAwakable(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 456,
-                                    nullptr));
-
-  // Write to "local_mp", port 1.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      local_mp->WriteMessage(1, UserPointer<const void>(kHello), sizeof(kHello),
-                             nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // TODO(vtl): FIXME -- We (racily) crash if I close |dispatcher| immediately
-  // here. (We don't crash if I sleep and then close.)
-
-  // Wait for the dispatcher to become readable.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(456u, context);
-  hss = HandleSignalsState();
-  dispatcher->RemoveAwakable(&waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from the dispatcher.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            dispatcher->ReadMessage(UserPointer<void>(read_buffer),
-                                    MakeUserPointer(&read_buffer_size), 0,
-                                    nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-
-  // Prepare to wait on "local_mp", port 1.
-  waiter.Init();
-  ASSERT_EQ(MOJO_RESULT_OK,
-            local_mp->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 789,
-                                  nullptr));
-
-  // Write to the dispatcher.
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->WriteMessage(
-                                UserPointer<const void>(kHello), sizeof(kHello),
-                                nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(789u, context);
-  hss = HandleSignalsState();
-  local_mp->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from "local_mp", port 1.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            local_mp->ReadMessage(1, UserPointer<void>(read_buffer),
-                                  MakeUserPointer(&read_buffer_size), nullptr,
-                                  nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-
-  // TODO(vtl): Also test that messages queued up before the handle was sent are
-  // delivered properly.
-
-  // Close everything that belongs to us.
-  mp0->Close(0);
-  mp1->Close(1);
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
-  // Note that |local_mp|'s port 0 belong to |dispatcher|, which was closed.
-  local_mp->Close(1);
-}
-
-TEST_F(RemoteMessagePipeTest, HandlePassingHalfClosed) {
-  static const char kHello[] = "hello";
-  static const char kWorld[] = "world!";
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  // We'll try to pass this dispatcher.
-  scoped_refptr<MessagePipeDispatcher> dispatcher(
-      new MessagePipeDispatcher(MessagePipeDispatcher::kDefaultCreateOptions));
-  scoped_refptr<MessagePipe> local_mp(MessagePipe::CreateLocalLocal());
-  dispatcher->Init(local_mp, 0);
-
-  hss = local_mp->GetHandleSignalsState(0);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-  // Write to the other end (|local_mp|, port 1), and then close it.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      local_mp->WriteMessage(1, UserPointer<const void>(kHello), sizeof(kHello),
-                             nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-  hss = local_mp->GetHandleSignalsState(0);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-  // Then the second message....
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      local_mp->WriteMessage(1, UserPointer<const void>(kWorld), sizeof(kWorld),
-                             nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-  hss = local_mp->GetHandleSignalsState(0);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-  // Then close it.
-  local_mp->Close(1);
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  char read_buffer[100] = {0};
-  uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  DispatcherVector read_dispatchers;
-  uint32_t read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->ReadMessage(1, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypeMessagePipe, read_dispatchers[0]->GetType());
-  dispatcher = static_cast<MessagePipeDispatcher*>(read_dispatchers[0].get());
-
-  // |dispatcher| should already be readable and not writable.
-  hss = dispatcher->GetHandleSignalsState();
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
-            hss.satisfied_signals);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
-            hss.satisfiable_signals);
-  // So read from it.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            dispatcher->ReadMessage(UserPointer<void>(read_buffer),
-                                    MakeUserPointer(&read_buffer_size), 0,
-                                    nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-  // It should still be readable.
-  hss = dispatcher->GetHandleSignalsState();
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
-            hss.satisfied_signals);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
-            hss.satisfiable_signals);
-  // So read from it.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            dispatcher->ReadMessage(UserPointer<void>(read_buffer),
-                                    MakeUserPointer(&read_buffer_size), 0,
-                                    nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kWorld), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kWorld, read_buffer);
-  // Now it should no longer be readable.
-  hss = dispatcher->GetHandleSignalsState();
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
-
-  // Close everything that belongs to us.
-  mp0->Close(0);
-  mp1->Close(1);
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
-}
-
-#if defined(OS_POSIX)
-#define MAYBE_SharedBufferPassing SharedBufferPassing
-#else
-// Not yet implemented (on Windows).
-#define MAYBE_SharedBufferPassing DISABLED_SharedBufferPassing
-#endif
-TEST_F(RemoteMessagePipeTest, MAYBE_SharedBufferPassing) {
-  static const char kHello[] = "hello";
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // We'll try to pass this dispatcher.
-  scoped_refptr<SharedBufferDispatcher> dispatcher;
-  EXPECT_EQ(MOJO_RESULT_OK, SharedBufferDispatcher::Create(
-                                platform_support(),
-                                SharedBufferDispatcher::kDefaultCreateOptions,
-                                100, &dispatcher));
-  ASSERT_TRUE(dispatcher);
-
-  // Make a mapping.
-  scoped_ptr<embedder::PlatformSharedBufferMapping> mapping0;
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->MapBuffer(
-                                0, 100, MOJO_MAP_BUFFER_FLAG_NONE, &mapping0));
-  ASSERT_TRUE(mapping0);
-  ASSERT_TRUE(mapping0->GetBase());
-  ASSERT_EQ(100u, mapping0->GetLength());
-  static_cast<char*>(mapping0->GetBase())[0] = 'A';
-  static_cast<char*>(mapping0->GetBase())[50] = 'B';
-  static_cast<char*>(mapping0->GetBase())[99] = 'C';
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  char read_buffer[100] = {0};
-  uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  DispatcherVector read_dispatchers;
-  uint32_t read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->ReadMessage(1, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypeSharedBuffer, read_dispatchers[0]->GetType());
-  dispatcher = static_cast<SharedBufferDispatcher*>(read_dispatchers[0].get());
-
-  // Make another mapping.
-  scoped_ptr<embedder::PlatformSharedBufferMapping> mapping1;
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->MapBuffer(
-                                0, 100, MOJO_MAP_BUFFER_FLAG_NONE, &mapping1));
-  ASSERT_TRUE(mapping1);
-  ASSERT_TRUE(mapping1->GetBase());
-  ASSERT_EQ(100u, mapping1->GetLength());
-  EXPECT_NE(mapping1->GetBase(), mapping0->GetBase());
-  EXPECT_EQ('A', static_cast<char*>(mapping1->GetBase())[0]);
-  EXPECT_EQ('B', static_cast<char*>(mapping1->GetBase())[50]);
-  EXPECT_EQ('C', static_cast<char*>(mapping1->GetBase())[99]);
-
-  // Write stuff either way.
-  static_cast<char*>(mapping1->GetBase())[1] = 'x';
-  EXPECT_EQ('x', static_cast<char*>(mapping0->GetBase())[1]);
-  static_cast<char*>(mapping0->GetBase())[2] = 'y';
-  EXPECT_EQ('y', static_cast<char*>(mapping1->GetBase())[2]);
-
-  // Kill the first mapping; the second should still be valid.
-  mapping0.reset();
-  EXPECT_EQ('A', static_cast<char*>(mapping1->GetBase())[0]);
-
-  // Close everything that belongs to us.
-  mp0->Close(0);
-  mp1->Close(1);
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
-
-  // The second mapping should still be good.
-  EXPECT_EQ('x', static_cast<char*>(mapping1->GetBase())[1]);
-}
-
-#if defined(OS_POSIX)
-#define MAYBE_PlatformHandlePassing PlatformHandlePassing
-#else
-// Not yet implemented (on Windows).
-#define MAYBE_PlatformHandlePassing DISABLED_PlatformHandlePassing
-#endif
-TEST_F(RemoteMessagePipeTest, MAYBE_PlatformHandlePassing) {
-  base::ScopedTempDir temp_dir;
-  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
-
-  static const char kHello[] = "hello";
-  static const char kWorld[] = "world";
-  Waiter waiter;
-  uint32_t context = 0;
-  HandleSignalsState hss;
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  base::FilePath unused;
-  base::ScopedFILE fp(
-      base::CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
-  EXPECT_EQ(sizeof(kHello), fwrite(kHello, 1, sizeof(kHello), fp.get()));
-  // We'll try to pass this dispatcher, which will cause a |PlatformHandle| to
-  // be passed.
-  scoped_refptr<PlatformHandleDispatcher> dispatcher(
-      new PlatformHandleDispatcher(
-          mojo::test::PlatformHandleFromFILE(fp.Pass())));
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp0->WriteMessage(0, UserPointer<const void>(kWorld), sizeof(kWorld),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  char read_buffer[100] = {0};
-  uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  DispatcherVector read_dispatchers;
-  uint32_t read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->ReadMessage(1, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kWorld), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kWorld, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypePlatformHandle, read_dispatchers[0]->GetType());
-  dispatcher =
-      static_cast<PlatformHandleDispatcher*>(read_dispatchers[0].get());
-
-  embedder::ScopedPlatformHandle h = dispatcher->PassPlatformHandle().Pass();
-  EXPECT_TRUE(h.is_valid());
-
-  fp = mojo::test::FILEFromPlatformHandle(h.Pass(), "rb").Pass();
-  EXPECT_FALSE(h.is_valid());
-  EXPECT_TRUE(fp);
-
-  rewind(fp.get());
-  memset(read_buffer, 0, sizeof(read_buffer));
-  EXPECT_EQ(sizeof(kHello),
-            fread(read_buffer, 1, sizeof(read_buffer), fp.get()));
-  EXPECT_STREQ(kHello, read_buffer);
-
-  // Close everything that belongs to us.
-  mp0->Close(0);
-  mp1->Close(1);
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
-}
-
-// Test racing closes (on each end).
-// Note: A flaky failure would almost certainly indicate a problem in the code
-// itself (not in the test). Also, any logged warnings/errors would also
-// probably be indicative of bugs.
-TEST_F(RemoteMessagePipeTest, RacingClosesStress) {
-  base::TimeDelta delay = base::TimeDelta::FromMilliseconds(5);
-
-  for (unsigned i = 0; i < 256; i++) {
-    DVLOG(2) << "---------------------------------------- " << i;
-    scoped_refptr<ChannelEndpoint> ep0;
-    scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-    BootstrapChannelEndpointNoWait(0, ep0);
-
-    scoped_refptr<ChannelEndpoint> ep1;
-    scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-    BootstrapChannelEndpointNoWait(1, ep1);
-
-    if (i & 1u) {
-      io_thread()->task_runner()->PostTask(
-          FROM_HERE, base::Bind(&base::PlatformThread::Sleep, delay));
-    }
-    if (i & 2u)
-      base::PlatformThread::Sleep(delay);
-
-    mp0->Close(0);
-
-    if (i & 4u) {
-      io_thread()->task_runner()->PostTask(
-          FROM_HERE, base::Bind(&base::PlatformThread::Sleep, delay));
-    }
-    if (i & 8u)
-      base::PlatformThread::Sleep(delay);
-
-    mp1->Close(1);
-
-    RestoreInitialState();
-  }
-}
-
-// Tests passing an end of a message pipe over a remote message pipe, and then
-// passing that end back.
-// TODO(vtl): Also test passing a message pipe across two remote message pipes.
-TEST_F(RemoteMessagePipeTest, PassMessagePipeHandleAcrossAndBack) {
-  static const char kHello[] = "hello";
-  static const char kWorld[] = "world";
-  Waiter waiter;
-  HandleSignalsState hss;
-  uint32_t context = 0;
-
-  scoped_refptr<ChannelEndpoint> ep0;
-  scoped_refptr<MessagePipe> mp0(MessagePipe::CreateLocalProxy(&ep0));
-  scoped_refptr<ChannelEndpoint> ep1;
-  scoped_refptr<MessagePipe> mp1(MessagePipe::CreateProxyLocal(&ep1));
-  BootstrapChannelEndpoints(ep0, ep1);
-
-  // We'll try to pass this dispatcher.
-  scoped_refptr<MessagePipeDispatcher> dispatcher(
-      new MessagePipeDispatcher(MessagePipeDispatcher::kDefaultCreateOptions));
-  scoped_refptr<MessagePipe> local_mp(MessagePipe::CreateLocalLocal());
-  dispatcher->Init(local_mp, 0);
-
-  // Prepare to wait on MP 1, port 1. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp1->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 123, nullptr));
-
-  // Write to MP 0, port 0.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp0->WriteMessage(0, UserPointer<const void>(kHello), sizeof(kHello),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(123u, context);
-  hss = HandleSignalsState();
-  mp1->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 1, port 1.
-  char read_buffer[100] = {0};
-  uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  DispatcherVector read_dispatchers;
-  uint32_t read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp1->ReadMessage(1, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypeMessagePipe, read_dispatchers[0]->GetType());
-  dispatcher = static_cast<MessagePipeDispatcher*>(read_dispatchers[0].get());
-  read_dispatchers.clear();
-
-  // Now pass it back.
-
-  // Prepare to wait on MP 0, port 0. (Add the waiter now. Otherwise, if we do
-  // it later, it might already be readable.)
-  waiter.Init();
-  ASSERT_EQ(
-      MOJO_RESULT_OK,
-      mp0->AddAwakable(0, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 456, nullptr));
-
-  // Write to MP 1, port 1.
-  {
-    DispatcherTransport transport(
-        test::DispatcherTryStartTransport(dispatcher.get()));
-    EXPECT_TRUE(transport.is_valid());
-
-    std::vector<DispatcherTransport> transports;
-    transports.push_back(transport);
-    EXPECT_EQ(
-        MOJO_RESULT_OK,
-        mp1->WriteMessage(1, UserPointer<const void>(kWorld), sizeof(kWorld),
-                          &transports, MOJO_WRITE_MESSAGE_FLAG_NONE));
-    transport.End();
-
-    // |dispatcher| should have been closed. This is |DCHECK()|ed when the
-    // |dispatcher| is destroyed.
-    EXPECT_TRUE(dispatcher->HasOneRef());
-    dispatcher = nullptr;
-  }
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(456u, context);
-  hss = HandleSignalsState();
-  mp0->RemoveAwakable(0, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from MP 0, port 0.
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  read_num_dispatchers = 10;  // Maximum to get.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      mp0->ReadMessage(0, UserPointer<void>(read_buffer),
-                       MakeUserPointer(&read_buffer_size), &read_dispatchers,
-                       &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kWorld), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kWorld, read_buffer);
-  EXPECT_EQ(1u, read_dispatchers.size());
-  EXPECT_EQ(1u, read_num_dispatchers);
-  ASSERT_TRUE(read_dispatchers[0]);
-  EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
-
-  EXPECT_EQ(Dispatcher::kTypeMessagePipe, read_dispatchers[0]->GetType());
-  dispatcher = static_cast<MessagePipeDispatcher*>(read_dispatchers[0].get());
-  read_dispatchers.clear();
-
-  // Add the waiter now, before it becomes readable to avoid a race.
-  waiter.Init();
-  ASSERT_EQ(MOJO_RESULT_OK,
-            dispatcher->AddAwakable(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 789,
-                                    nullptr));
-
-  // Write to "local_mp", port 1.
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      local_mp->WriteMessage(1, UserPointer<const void>(kHello), sizeof(kHello),
-                             nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // Wait for the dispatcher to become readable.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(789u, context);
-  hss = HandleSignalsState();
-  dispatcher->RemoveAwakable(&waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from the dispatcher.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            dispatcher->ReadMessage(UserPointer<void>(read_buffer),
-                                    MakeUserPointer(&read_buffer_size), 0,
-                                    nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-
-  // Prepare to wait on "local_mp", port 1.
-  waiter.Init();
-  ASSERT_EQ(MOJO_RESULT_OK,
-            local_mp->AddAwakable(1, &waiter, MOJO_HANDLE_SIGNAL_READABLE, 789,
-                                  nullptr));
-
-  // Write to the dispatcher.
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->WriteMessage(
-                                UserPointer<const void>(kHello), sizeof(kHello),
-                                nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
-
-  // Wait.
-  EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(MOJO_DEADLINE_INDEFINITE, &context));
-  EXPECT_EQ(789u, context);
-  hss = HandleSignalsState();
-  local_mp->RemoveAwakable(1, &waiter, &hss);
-  EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
-            hss.satisfied_signals);
-  EXPECT_EQ(kAllSignals, hss.satisfiable_signals);
-
-  // Read from "local_mp", port 1.
-  memset(read_buffer, 0, sizeof(read_buffer));
-  read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  EXPECT_EQ(MOJO_RESULT_OK,
-            local_mp->ReadMessage(1, UserPointer<void>(read_buffer),
-                                  MakeUserPointer(&read_buffer_size), nullptr,
-                                  nullptr, MOJO_READ_MESSAGE_FLAG_NONE));
-  EXPECT_EQ(sizeof(kHello), static_cast<size_t>(read_buffer_size));
-  EXPECT_STREQ(kHello, read_buffer);
-
-  // TODO(vtl): Also test the cases where messages are written and read (at
-  // various points) on the message pipe being passed around.
-
-  // Close everything that belongs to us.
-  mp0->Close(0);
-  mp1->Close(1);
-  EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
-  // Note that |local_mp|'s port 0 belong to |dispatcher|, which was closed.
-  local_mp->Close(1);
-}
-
-}  // namespace
-}  // namespace system
-}  // namespace mojo