Remove CreatePlatformFile from file_util_proxy

base/files/file_util_proxy_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 "base/files/file_util_proxy.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 70 matching lines @@
                 int bytes_written) {
     error_ = error;
     bytes_written_ = bytes_written;
     MessageLoop::current()->QuitWhenIdle();
   }
 
  protected:
   PlatformFile GetTestPlatformFile(int flags) {
     if (file_ != kInvalidPlatformFileValue)
       return file_;
-    bool created;
-    PlatformFileError error;
-    file_ = CreatePlatformFile(test_path(), flags, &created, &error);
-    EXPECT_EQ(PLATFORM_FILE_OK, error);
-    EXPECT_NE(kInvalidPlatformFileValue, file_);
+
+    File file(test_path(), flags);
+    EXPECT_TRUE(file.IsValid());
+    file_ = file.TakePlatformFile();
     return file_;
   }
 
   TaskRunner* file_task_runner() const {
     return file_thread_.message_loop_proxy().get();
   }
   const FilePath& test_dir_path() const { return dir_.path(); }
   const FilePath test_path() const { return dir_.path().AppendASCII("test"); }
 
   MessageLoopForIO message_loop_;
@@ skipping 295 matching lines @@
   char buffer[53];
   EXPECT_EQ(53, base::ReadFile(test_path(), buffer, 53));
   int i = 0;
   for (; i < 10; ++i)
     EXPECT_EQ(kTestData[i], buffer[i]);
   for (; i < 53; ++i)
     EXPECT_EQ(0, buffer[i]);
 }
 
 }  // namespace base