gdata: Add requestDirectoryRefresh to file_browser_private.

chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc

 // 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.
 
 #include <errno.h>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 3645 matching lines @@
                       GDataRootDirectory::CACHE_TYPE_TMP);
   EXPECT_EQ(1, num_callback_invocations_);
   EXPECT_TRUE(CacheEntryExists(resource_id, md5));
 
   // Try to remove the file.
   num_callback_invocations_ = 0;
   TestRemoveFromCache(resource_id, base::PLATFORM_FILE_OK);
   EXPECT_EQ(1, num_callback_invocations_);
 }
 
+TEST_F(GDataFileSystemTest, RequestDirectoryRefresh) {
+  // We'll fetch documents in the root directory with its resource ID.
+  EXPECT_CALL(*mock_doc_service_,
+              GetDocuments(Eq(GURL()), _, _, kGDataRootDirectoryResourceId, _))
+      .Times(1);
+  // We'll notify the directory change to the observer.
+  EXPECT_CALL(*mock_directory_observer_,
+              OnDirectoryChanged(Eq(FilePath(kGDataRootDirectory)))).Times(1);
+
+  file_system_->RequestDirectoryRefresh(FilePath(kGDataRootDirectory));
+  message_loop_.RunAllPending();
+}
+
 }   // namespace gdata