am e624b3fa: update the init_google_navtree2 method to handle new format for sample nav tree data. and update highlighting logic to handle hashtags

* commit 'e624b3fa474283e0c8d869b9d1754f001e83e349':
  update the init_google_navtree2 method to handle new format for sample nav tree data. and update highlighting logic to handle hashtags