Notify CloseFile from Pepper to FileSystem.

webkit/chromeos/fileapi/remote_file_system_proxy.h

Index: webkit/chromeos/fileapi/remote_file_system_proxy.h
diff --git a/webkit/chromeos/fileapi/remote_file_system_proxy.h b/webkit/chromeos/fileapi/remote_file_system_proxy.h
index 77e4a04df198e4dba17fe76dc4da0d27b5a3ef99..4f3f2ed4507074ddfb3980eae55661e1efb02a85 100644
--- a/webkit/chromeos/fileapi/remote_file_system_proxy.h
+++ b/webkit/chromeos/fileapi/remote_file_system_proxy.h
@@ -94,6 +94,10 @@ class RemoteFileSystemProxyInterface :
       int flags,
       base::ProcessHandle peer_handle,
       const FileSystemOperationInterface::OpenFileCallback& callback) = 0;
+
+  // Notifies that a file opened by OpenFile (at |path|) is closed.
+  virtual void NotifyCloseFile(const GURL& path) = 0;
+
   // TODO(zelidrag): More methods to follow as we implement other parts of FSO.
 };