Remove some PlatformFile uses from WebKit

webkit/browser/fileapi/sandbox_database_test_helper.cc

Index: webkit/browser/fileapi/sandbox_database_test_helper.cc
diff --git a/webkit/browser/fileapi/sandbox_database_test_helper.cc b/webkit/browser/fileapi/sandbox_database_test_helper.cc
index 5c9176c0878c8156fe597a9e754170f6fafed697..0c5ef14b068bdaec2e0f981549779b2f6bec3174 100644
--- a/webkit/browser/fileapi/sandbox_database_test_helper.cc
+++ b/webkit/browser/fileapi/sandbox_database_test_helper.cc
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/file_util.h"
+#include "base/files/file.h"
 #include "base/files/file_enumerator.h"
 #include "base/stl_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -41,19 +42,14 @@ void CorruptDatabase(const base::FilePath& db_path,
   EXPECT_FALSE(picked_file_path.empty());
   EXPECT_NE(kuint64max, picked_file_number);
 
-  bool created = true;
-  base::PlatformFileError error = base::PLATFORM_FILE_ERROR_FAILED;
-  base::PlatformFile file =
-      CreatePlatformFile(picked_file_path,
-                         base::PLATFORM_FILE_OPEN |
-                         base::PLATFORM_FILE_READ |
-                         base::PLATFORM_FILE_WRITE,
-                         &created, &error);
-  EXPECT_EQ(base::PLATFORM_FILE_OK, error);
-  EXPECT_FALSE(created);
+  base::File file(picked_file_path,
+                  base::File::FLAG_OPEN | base::File::FLAG_READ |
+                      base::File::FLAG_WRITE);
+  ASSERT_TRUE(file.IsValid());
+  EXPECT_FALSE(file.created());
 
-  base::PlatformFileInfo file_info;
-  EXPECT_TRUE(base::GetPlatformFileInfo(file, &file_info));
+  base::File::Info file_info;
+  EXPECT_TRUE(file.GetInfo(&file_info));
   if (offset < 0)
     offset += file_info.size;
   EXPECT_GE(offset, 0);
@@ -62,8 +58,7 @@ void CorruptDatabase(const base::FilePath& db_path,
   size = std::min(size, static_cast<size_t>(file_info.size - offset));
 
   std::vector<char> buf(size);
-  int read_size = base::ReadPlatformFile(file, offset,
-                                         vector_as_array(&buf), buf.size());
+  int read_size = file.Read(offset, vector_as_array(&buf), buf.size());
   EXPECT_LT(0, read_size);
   EXPECT_GE(buf.size(), static_cast<size_t>(read_size));
   buf.resize(read_size);
@@ -71,12 +66,9 @@ void CorruptDatabase(const base::FilePath& db_path,
   std::transform(buf.begin(), buf.end(), buf.begin(),
                  std::logical_not<char>());
 
-  int written_size = base::WritePlatformFile(file, offset,
-                                             vector_as_array(&buf), buf.size());
+  int written_size = file.Write(offset, vector_as_array(&buf), buf.size());
   EXPECT_GT(written_size, 0);
   EXPECT_EQ(buf.size(), static_cast<size_t>(written_size));
-
-  base::ClosePlatformFile(file);
 }
 
 void DeleteDatabaseFile(const base::FilePath& db_path,