Remove stray platform_file.h from content

content/browser/fileapi/sandbox_prioritized_origin_database_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 "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
-#include "base/platform_file.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/fileapi/sandbox_origin_database.h"
 #include "webkit/browser/fileapi/sandbox_prioritized_origin_database.h"
 
 using fileapi::SandboxOriginDatabase;
 using fileapi::SandboxOriginDatabaseInterface;
 using fileapi::SandboxPrioritizedOriginDatabase;
 
 namespace content {
 
@@ skipping 190 matching lines @@
   EXPECT_TRUE(base::ReadFileToString(
       dir_db_path.AppendASCII("dummy"), &origin_db_data));
   EXPECT_EQ(kFakeDirectoryData2, origin_db_data);
 
   // After the migration the kOrigin1 directory database path must be gone.
   EXPECT_FALSE(base::PathExists(old_dir_db_path1));
   EXPECT_TRUE(base::PathExists(old_dir_db_path2));
 }
 
 }  // namespace content