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

webkit/fileapi/obfuscated_file_util.h

Index: webkit/fileapi/obfuscated_file_util.h
diff --git a/webkit/fileapi/obfuscated_file_util.h b/webkit/fileapi/obfuscated_file_util.h
index 7f13995286920e93b6d4379294cafe69c0e62173..f214dc2c3bdc364d896c2a34bddfb524cdb8c926 100644
--- a/webkit/fileapi/obfuscated_file_util.h
+++ b/webkit/fileapi/obfuscated_file_util.h
@@ -241,6 +241,13 @@ class WEBKIT_STORAGE_EXPORT_PRIVATE ObfuscatedFileUtil
       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_;