tree 5aecec795a593c0a5a6bed1dfe2d49e32c63dddc
parent 4f5687027af2f5dfff20f44f95b4bb0c65c85730
author Dave Borowitz <dborowitz@google.com> 1398967624 -0700
committer Dave Borowitz <dborowitz@google.com> 1399411892 -0700

Factor out common walking logic in PathServlet

We can't just use a TreeWalk for this in all cases because it has no
concept of being positioned just before a root tree. Plus, there are
various other pieces that we pass around with TreeWalk that make sense
to encapsulate together.

Change-Id: Ia82d4df558aceef4c2ddd8a0b17972fbd3db01e0