Add a mojo::test::ScopedTestDir and convert tests to use it.

mojo/edk/system/remote_message_pipe_unittest.cc

 // 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_temp_dir.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #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/scoped_test_dir.h"
 #include "mojo/edk/test/test_io_thread.h"
 #include "mojo/edk/test/test_utils.h"
 #include "mojo/edk/util/scoped_file.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 namespace {
 
@@ skipping 973 matching lines @@
   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());
+  mojo::test::ScopedTestDir test_dir;
 
   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;
-  util::ScopedFILE fp(
-      base::CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
+  util::ScopedFILE fp(test_dir.CreateFile());
   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 =
       PlatformHandleDispatcher::Create(
           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();
@@ skipping 314 matching lines @@
   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