Cleanup: Remove using statements from webkit/fileapi header files.

webkit/fileapi/file_system_file_util_proxy.h

 // 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.
 
 #ifndef WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
 
-#include <vector>
-
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "base/file_util_proxy.h"
-#include "base/memory/ref_counted.h"
 #include "base/platform_file.h"
-#include "base/tracked_objects.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_operation.h"
 
 namespace fileapi {
 
-using base::PlatformFile;
-using base::PlatformFileError;
-using base::PlatformFileInfo;
-
 class FileSystemFileUtil;
 class FileSystemOperationContext;
 class FileSystemURL;
 
 // This class provides asynchronous access to FileSystemFileUtil methods for
 // FileSystem API operations.  This also implements cross-FileUtil copy/move
 // operations on top of FileSystemFileUtil methods.
 class FileSystemFileUtilProxy {
  public:
   // Some of the proxy routines are just wrapping around the FileUtilProxy's
   // relay methods, so we use the same types as FileUtilProxy for them.
   typedef base::FileUtilProxy::Entry Entry;
   typedef base::FileUtilProxy::CreateOrOpenCallback CreateOrOpenCallback;
 
-  typedef base::Callback<void(PlatformFileError status)> StatusCallback;
-  typedef base::Callback<void(PlatformFileError status,
+  typedef base::Callback<void(base::PlatformFileError status)> StatusCallback;
+  typedef base::Callback<void(base::PlatformFileError status,
                               bool created)> EnsureFileExistsCallback;
   typedef FileSystemOperation::GetMetadataCallback GetFileInfoCallback;
   typedef FileSystemOperation::ReadDirectoryCallback ReadDirectoryCallback;
 
   typedef base::Callback<
       void(base::PlatformFileError result,
            const base::PlatformFileInfo& file_info,
            const FilePath& platform_path,
            FileSystemFileUtil::SnapshotFilePolicy snapshot_policy)>
       SnapshotFileCallback;
@@ skipping 124 matching lines @@
       int64 length,
       const StatusCallback& callback);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemFileUtilProxy);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_