reverted back to path instead of pathos and use explicit package root, just like buildbot

reverted back to path instead of pathos and use explicit package root, just like buildbot

R=rnystrom@google.com

Committed: https://code.google.com/p/dart/source/detail?r=25062

[janicejl, 2013-07-16 01:21:39]

Only change is going from pathos to path in the import statements. 

All the other changes are exactly the same as when reviewed at
https://codereview.chromium.org/19220006/

[Bob Nystrom, 2013-07-16 15:57:46]

LGTM.

[janicejl, 2013-07-16 16:50:02]

Made one small change to replace the \n in between a close tag and an open tag
to a space. This will then keep the new line characters inside tags there.

[Bob Nystrom, 2013-07-16 17:13:33]

On 2013/07/16 16:50:02, janicejl wrote:
> Made one small change to replace the \n in between a close tag and an open tag
> to a space. This will then keep the new line characters inside tags there.

Why is this needed? Aren't you escaping the newlines when converting to YAML and
back anyway?

[janicejl, 2013-07-16 17:48:38]

Sorry. Back to assuming the Viewer will handle all the \n characters.

[Bob Nystrom, 2013-07-16 17:52:08]

LGTM!

[janicejl, 2013-07-16 18:08:31]

Committed patchset #4 manually as r25062 (presubmit successful).