Add directory_entry.cc to libppapi_cpp

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

Index: native_client_sdk/src/examples/api/file_io/example.js
diff --git a/native_client_sdk/src/examples/api/file_io/example.js b/native_client_sdk/src/examples/api/file_io/example.js
index e73f4b946238dc1f230c85befcd1f7b9267d12bd..1183c9cd433c1652397f20a6f9b462647cb50a36 100644
--- a/native_client_sdk/src/examples/api/file_io/example.js
+++ b/native_client_sdk/src/examples/api/file_io/example.js
@@ -19,6 +19,7 @@ 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() {
@@ -55,6 +56,17 @@ function deleteFile() {
   }
 }
 
+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);