root/chrome/browser/tab_contents/

[..]
  1. background_contents.cc
  2. background_contents.h
  3. navigation_metrics_recorder.cc
  4. navigation_metrics_recorder.h
  5. retargeting_details.h
  6. tab_util.cc
  7. tab_util.h
  8. view_source_browsertest.cc
[..]