[FileAPI] Disable usage cache for origin after file opening for pepper.

webkit/fileapi/obfuscated_file_util.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_OBFUSCATED_FILE_UTIL_H_
 #define WEBKIT_FILEAPI_OBFUSCATED_FILE_UTIL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 223 matching lines @@
   void DropDatabases();
   bool InitOriginDatabase(bool create);
 
   base::PlatformFileError GenerateNewLocalPath(
       FileSystemDirectoryDatabase* db,
       FileSystemOperationContext* context,
       const GURL& origin,
       FileSystemType type,
       base::FilePath* local_path);
 
+  base::PlatformFileError CreateOrOpenInternal(
+      FileSystemOperationContext* context,
+      const FileSystemURL& url,
+      int file_flags,
+      base::PlatformFile* file_handle,
+      bool* created);
+
   typedef std::map<std::string, FileSystemDirectoryDatabase*> DirectoryMap;
   DirectoryMap directories_;
   scoped_ptr<FileSystemOriginDatabase> origin_database_;
   base::FilePath file_system_directory_;
   base::OneShotTimer<ObfuscatedFileUtil> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ObfuscatedFileUtil);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_OBFUSCATED_FILE_UTIL_H_