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

webkit/fileapi/sandbox_mount_point_provider.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_SANDBOX_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_FILEAPI_SANDBOX_MOUNT_POINT_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 26 matching lines @@
 
 // An interface to construct or crack sandboxed filesystem paths for
 // TEMPORARY or PERSISTENT filesystems, which are placed under the user's
 // profile directory in a sandboxed way.
 // This interface also lets one enumerate and remove storage for the origins
 // that use the filesystem.
 class WEBKIT_STORAGE_EXPORT SandboxMountPointProvider
     : public FileSystemMountPointProvider,
       public FileSystemQuotaUtil {
  public:
-  using FileSystemMountPointProvider::ValidateFileSystemCallback;
-  using FileSystemMountPointProvider::DeleteFileSystemCallback;
-
   // Origin enumerator interface.
   // An instance of this interface is assumed to be called on the file thread.
   class OriginEnumerator {
    public:
     virtual ~OriginEnumerator() {}
 
     // Returns the next origin.  Returns empty if there are no more origins.
     virtual GURL Next() = 0;
 
     // Returns the current origin's information.
@@ skipping 170 matching lines @@
   bool enable_sync_directory_operation_;
 
   base::WeakPtrFactory<SandboxMountPointProvider> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SandboxMountPointProvider);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_SANDBOX_MOUNT_POINT_PROVIDER_H_