Merge "Deduplicate simple roots in hprof."
am: e07a0b0c6b

* commit 'e07a0b0c6b694ddd2d101cff6bc04ec93a6c8125':
  Deduplicate simple roots in hprof.

Change-Id: I19695ebcd85b6eeec5f1cfc77b9354062884af7d