drive: Stop calling OnChangeListLoadComplete() if DirectoryFetchInfo is not empty

Call LoadAfterLoadDirectory() instead.

BUG=333164
TEST=unit_tests

Review URL: https://codereview.chromium.org/132503004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244406 0039d316-1c4b-4281-b951-d872f2087c98
void ChangeListLoader::LoadAfterLoadDirectory(
    const DirectoryFetchInfo& directory_fetch_info,
    bool is_initial_load,
    int64 start_changestamp,
    FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  OnDirectoryLoadComplete(directory_fetch_info, error);

  if (is_initial_load)
    LoadChangeListFromServer(start_changestamp);
}

void ChangeListLoader::LoadAfterLoadDirectory(
    const DirectoryFetchInfo& directory_fetch_info,
    bool is_initial_load,
    int64 start_changestamp,
    FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  OnDirectoryLoadComplete(directory_fetch_info, error);

  if (is_initial_load)
    LoadChangeListFromServer(start_changestamp);
}
