Postpone setting up file handler's file permissions if handler is running lazy background page.

chrome/test/data/extensions/api_test/filesystem_handler_lazy_background/tab.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.
+
+// The ID of the extension we want to talk to.
+var fileBrowserExtensionId = "ddammdhioacbehjngdmkjcjbnfginlla";
+
+function errorCallback(error) {
+  var msg = '';
+  if (!error.code) {
+    msg = error.message;
+  } else {
+    switch (error.code) {
+      case FileError.QUOTA_EXCEEDED_ERR:
+        msg = 'QUOTA_EXCEEDED_ERR';
+        break;
+      case FileError.NOT_FOUND_ERR:
+        msg = 'NOT_FOUND_ERR';
+        break;
+      case FileError.SECURITY_ERR:
+        msg = 'SECURITY_ERR';
+        break;
+      case FileError.INVALID_MODIFICATION_ERR:
+        msg = 'INVALID_MODIFICATION_ERR';
+        break;
+      case FileError.INVALID_STATE_ERR:
+        msg = 'INVALID_STATE_ERR';
+        break;
+      default:
+        msg = 'Unknown Error';
+        break;
+    };
+  }
+
+  chrome.extension.sendRequest(fileBrowserExtensionId,
+                               {fileContent: null,
+                                error: {message: "File handler error: " + msg}},
+                               function(response) {});
+};
+
+function onGotEntryByUrl(entry) {
+  var reader = new FileReader();
+  reader.onloadend = function(e) {
+    // Send data back to the file browser extension
+    chrome.extension.sendRequest(
+        fileBrowserExtensionId,
+        {fileContent: reader.result, error: null},
+        function(response) {});
+  };
+  reader.onerror = function(e) {
+    errorCallback(reader.error);
+  };
+  entry.file(function(file) {
+    reader.readAsText(file);
+  },
+  errorCallback);
+};
+
+function readEntryByUrl(entryUrl) {
+  window.webkitResolveLocalFileSystemURL(entryUrl, onGotEntryByUrl,
+                                         errorCallback);
+};
+
+readEntryByUrl(localStorage.entryURL);