Add browser_tests for FileAPI with Quota.

chrome/test/data/fileapi/quota_test.js

+// Copyright (c) 2011 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.
+
+function truncateFailByQuota(fs) {
+  fs.root.getFile('fd', {create: false, exclusive: false}, function(fileEntry) {
+    fileEntry.createWriter(function(fileWriter) {
+      var failedInTruncate = false;
+      fileWriter.onerror = function(e) {
+        failedInTruncate = true;
+      };
+      fileWriter.onwriteend = function(e) {
+        if (failedInTruncate) {
+          fail(e.currentTarget.error);
+        } else {
+          done();
+        }
+      };
+      fileWriter.truncate(2500 * 1024);
+    }, unexpectedErrorCallback)
+  }, function(e) { fail('Open for 2nd truncate:' + fileErrorToString(e)); } );
+}
+
+function requestFileSystemSuccess(fs) {
+  fs.root.getFile('fd', {create: true, exclusive: false}, function(fileEntry) {
+    fileEntry.createWriter(function(fileWriter) {
+      var failedInTruncate = false;
+      fileWriter.onerror = function(e) {
+        debug(e.currentTarget.error);
+        failedInTruncate = true;
+      };
+      fileWriter.onwriteend = function() {
+        if (failedInTruncate) {
+          truncateFailByQuota(fs);
+        } else {
+          fail('Unexpectedly succeeded to truncate.  It should fail by quota.');
+        }
+      }

[kinuko, 2011/09/01 05:11:53]

nit: semicolon after '}'

[Dai Mikurube (NOT FULLTIME), 2011/09/01 06:54:09]

Done.

+      fileWriter.truncate(10000 * 1024);
+    }, unexpectedErrorCallback)
+  }, function(e) { fail('Open for 1st truncate:' + fileErrorToString(e)); } );
+}
+
+function quotaSuccess(usage, quota) {
+  if (usage != 0)
+    fail('Usage is not zero: ' + usage);
+  if (quota != 5000 * 1024)
+    fail('Quota is not 5000KiB: ' + quota);
+
+  window.webkitRequestFileSystem(
+      window.TEMPORARY,
+      1024 * 1024,
+      requestFileSystemSuccess,
+      unexpectedErrorCallback);
+}
+
+function test() {
+  if (window.webkitStorageInfo) {
+    debug('Querying usage and quota.');
+    webkitStorageInfo.queryUsageAndQuota(webkitStorageInfo.TEMPORARY,
+                                         quotaSuccess,
+                                         unexpectedErrorCallback);
+  } else {
+    debug('This test requires window.webkitStorageInfo.');
+  }
+}