tree b2c7abd4b3624dc1f801f6a29893e0f66497f378
parent a708e32a9f764a48175e705ec4bcd2201c84f492
author Mathieu Chartier <mathieuc@google.com> 1395961786 -0700
committer Mathieu Chartier <mathieuc@google.com> 1396031702 -0700

Refactor some GC code.

Reduced amount of code in mark sweep / semi space by moving
common logic to garbage_collector.cc. Cleaned up mod union tables
and deleted an unused implementation.

Change-Id: I4bcc6ba41afd96d230cfbaf4d6636f37c52e37ea