AI 150393: edit the reference's navtree highlighting logic to handle intl/ directories   BUG=1790234
AI 150393: edit the reference's navtree highlighting logic to handle intl/ directories
  BUG=1790234

Automated import of CL 150393

see4ri/lolili,xorware/android_build,fallouttester/platform_manifest,xorware/android_build,Hybrid-Power/startsync,xorware/android_build,ND-3500/platform_manifest,xorware/android_build,hagar006/platform_manifest,knone1/platform_manifest,RR-msm7x30/platform_manifest,pranav01/platform_manifest,xorware/android_build