Add directory_entry.cc to libppapi_cpp

native_client_sdk/src/examples/api/file_io/example.js

 // 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.
 
 // Called by the common.js module.
 function domContentLoaded(name, tc, config, width, height) {
   window.webkitStorageInfo.requestQuota(window.PERSISTENT, 1024*1024,
       function(bytes) {
         common.updateStatus(
             'Allocated '+bytes+' bytes of persistant storage.');
         common.createNaClModule(name, tc, config, width, height);
         common.attachDefaultListeners();
       },
       function(e) { alert('Failed to allocate space') });
 }
 
 // Called by the common.js module.
 function attachListeners() {
   document.getElementById('saveButton').addEventListener('click', saveFile);
   document.getElementById('loadButton').addEventListener('click', loadFile);
   document.getElementById('deleteButton').addEventListener('click', deleteFile);
+  document.getElementById('listButton').addEventListener('click', listDir);
 }
 
 function loadFile() {
   if (common.naclModule) {
     var fileName = document.getElementById('fileName').value;
 
     // Package a message using a simple protocol containing:
     // instruction file_name_length file_name
     var msg = "ld " + fileName.length + " " + fileName;
     common.naclModule.postMessage(msg);
@@ skipping 16 matching lines @@
   if (common.naclModule) {
     var fileName = document.getElementById('fileName').value;
 
     // Package a message using a simple protocol containing:
     // instruction file_name_length file_name
     var msg = "de " + fileName.length + " " + fileName;
     common.naclModule.postMessage(msg);
   }
 }
 
+function listDir() {
+  if (common.naclModule) {
+    var dirName = document.getElementById('dirName').value;
+
+    // Package a message using a simple protocol containing:
+    // instruction file_name_length file_name
+    var msg = "ls " + dirName.length + " " + dirName;
+    common.naclModule.postMessage(msg);
+  }
+}
+
 // Called by the common.js module.
 function handleMessage(message_event) {
   var messageParts = message_event.data.split("|", 3);
 
   if (messageParts[0] == "ERR") {
     common.updateStatus(messageParts[1]);
     document.getElementById('statusField').style.color = "red";
   }
   else if(messageParts[0] == "STAT") {
     common.updateStatus(messageParts[1]);
   }
   else if (messageParts[0] == "DISP") {
     // Display the message in the file edit box
     document.getElementById('fileEditor').value = messageParts[1];
   }
   else if (messageParts[0] == "READY") {
     var statusField = document.getElementById('statusField');
     common.updateStatus(statusField.innerHTML + ' Ready!');
   }
 }