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

mojo/edk/system/raw_channel_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 "mojo/edk/system/raw_channel.h"
 
 #include <stdint.h>
 #include <stdio.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/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/simple_thread.h"
 #include "build/build_config.h"  // TODO(vtl): Remove this.
 #include "mojo/edk/embedder/platform_channel_pair.h"
 #include "mojo/edk/embedder/platform_handle.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/message_in_transit.h"
 #include "mojo/edk/system/mutex.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/edk/system/transport_data.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 754 matching lines @@
   MOJO_DISALLOW_COPY_AND_ASSIGN(ReadPlatformHandlesCheckerRawChannelDelegate);
 };
 
 #if defined(OS_POSIX)
 #define MAYBE_ReadWritePlatformHandles ReadWritePlatformHandles
 #else
 // Not yet implemented (on Windows).
 #define MAYBE_ReadWritePlatformHandles DISABLED_ReadWritePlatformHandles
 #endif
 TEST_F(RawChannelTest, MAYBE_ReadWritePlatformHandles) {
-  base::ScopedTempDir temp_dir;
-  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  mojo::test::ScopedTestDir test_dir;
 
   WriteOnlyRawChannelDelegate write_delegate;
   scoped_ptr<RawChannel> rc_write(RawChannel::Create(handles[0].Pass()));
   io_thread()->PostTaskAndWait(FROM_HERE,
                                base::Bind(&InitOnIOThread, rc_write.get(),
                                           base::Unretained(&write_delegate)));
 
   ReadPlatformHandlesCheckerRawChannelDelegate read_delegate;
   scoped_ptr<RawChannel> rc_read(RawChannel::Create(handles[1].Pass()));
   io_thread()->PostTaskAndWait(FROM_HERE,
                                base::Bind(&InitOnIOThread, rc_read.get(),
                                           base::Unretained(&read_delegate)));
 
-  base::FilePath unused;
-  util::ScopedFILE fp1(
-      base::CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
+  util::ScopedFILE fp1(test_dir.CreateFile());
   EXPECT_EQ(1u, fwrite("1", 1, 1, fp1.get()));
-  util::ScopedFILE fp2(
-      base::CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
+  util::ScopedFILE fp2(test_dir.CreateFile());
   EXPECT_EQ(1u, fwrite("2", 1, 1, fp2.get()));
 
   {
     const char kHello[] = "hello";
     embedder::ScopedPlatformHandleVectorPtr platform_handles(
         new embedder::PlatformHandleVector());
     platform_handles->push_back(
         mojo::test::PlatformHandleFromFILE(fp1.Pass()).release());
     platform_handles->push_back(
         mojo::test::PlatformHandleFromFILE(fp2.Pass()).release());
@@ skipping 13 matching lines @@
       FROM_HERE,
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_read.get())));
   io_thread()->PostTaskAndWait(
       FROM_HERE,
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_write.get())));
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo