Remove fileapi::FileSystemFileUtil dependency in media gallery code

chrome/browser/media_galleries/fileapi/picasa_file_util_unittest.cc

 // Copyright 2013 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 <set>
 #include <string>
 #include <vector>
 
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
@@ skipping 13 matching lines @@
 #include "chrome/browser/media_galleries/fileapi/picasa_file_util.h"
 #include "chrome/common/media_galleries/picasa_types.h"
 #include "chrome/common/media_galleries/pmp_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread.h"
 #include "content/public/test/test_file_system_options.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/fileapi/async_file_util.h"
 #include "webkit/browser/fileapi/external_mount_points.h"
 #include "webkit/browser/fileapi/file_system_context.h"
-#include "webkit/browser/fileapi/file_system_file_util.h"
 #include "webkit/browser/fileapi/file_system_operation_context.h"
 #include "webkit/browser/fileapi/file_system_operation_runner.h"
 #include "webkit/browser/fileapi/isolated_context.h"
 #include "webkit/browser/quota/mock_special_storage_policy.h"
 #include "webkit/common/blob/shareable_file_reference.h"
 
-using fileapi::FileSystemFileUtil;
 using fileapi::FileSystemOperationContext;
 using fileapi::FileSystemOperation;
 using fileapi::FileSystemURL;
 
 namespace picasa {
 
 namespace {
 
 base::Time::Exploded test_date_exploded = { 2013, 4, 0, 16, 0, 0, 0, 0 };
 
@@ skipping 537 matching lines @@
   operation_runner()->CreateSnapshotFile(
       CreateURL(std::string(kPicasaDirAlbums) +
                 "/albumname 2013-04-16/mapped_name.jpg"),
       snapshot_callback);
   loop.Run();
   EXPECT_EQ(base::PLATFORM_FILE_OK, error);
   EXPECT_EQ(image_path, platform_path_result);
 }
 
 }  // namespace picasa