Remove some PlatformFile uses from WebKit

webkit/browser/blob/local_file_stream_reader_unittest.cc

 // Copyright (c) 2012 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 "webkit/browser/blob/local_file_stream_reader.h"
 
 #include <string>
 
 #include "base/file_util.h"
+#include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/platform_file.h"
 #include "base/run_loop.h"
 #include "base/threading/thread.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace webkit_blob {
 
 namespace {
@@ skipping 104 matching lines @@
       CreateFileReader(nonexistent_path, 0, base::Time()));
   int result = 0;
   std::string data;
   ReadFromReader(reader.get(), &data, 10, &result);
   ASSERT_EQ(net::ERR_FILE_NOT_FOUND, result);
   ASSERT_EQ(0U, data.size());
 }
 
 TEST_F(LocalFileStreamReaderTest, Empty) {
   base::FilePath empty_path = test_dir().AppendASCII("empty");
-  base::PlatformFileError error = base::PLATFORM_FILE_OK;
-  base::PlatformFile file = base::CreatePlatformFile(
-      empty_path,
-      base::PLATFORM_FILE_CREATE | base::PLATFORM_FILE_READ,
-      NULL, &error);
-  ASSERT_EQ(base::PLATFORM_FILE_OK, error);
-  ASSERT_NE(base::kInvalidPlatformFileValue, file);
-  base::ClosePlatformFile(file);
+  base::File file(empty_path, base::File::FLAG_CREATE | base::File::FLAG_READ);
+  ASSERT_TRUE(file.IsValid());
+  file.Close();
 
   scoped_ptr<LocalFileStreamReader> reader(
       CreateFileReader(empty_path, 0, base::Time()));
   int result = 0;
   std::string data;
   ReadFromReader(reader.get(), &data, 10, &result);
   ASSERT_EQ(net::OK, result);
   ASSERT_EQ(0U, data.size());
 
   net::TestInt64CompletionCallback callback;
@@ skipping 96 matching lines @@
   int rv = reader->Read(buf.get(), buf->size(), base::Bind(&NeverCalled));
   ASSERT_TRUE(rv == net::ERR_IO_PENDING || rv >= 0);
 
   // Delete immediately.
   // Should not crash; nor should NeverCalled be callback.
   reader.reset();
   EnsureFileTaskFinished();
 }
 
 }  // namespace webkit_blob