Make DEPS use relative paths to fix recipe

Make DEPS use relative paths to fix recipe

Context: DEPS was originally added to pdfium to allow its recipe to
automatically check out its dependencies. The recipe used absolute
paths, and so the checkout directory's name ('pdfium') had to be
prefixed to the directory checkout of every dependency, as gclient in
the recipe worked one level above the pdfium checkout itself.

After change fe4537269fc7133320a5131638757f2ffa6bd854, the recipe no
longer worked. To fix this, I'm making DEPS use relative paths.

BUG=375773
R=jam@chromium.org

Committed: https://pdfium.googlesource.com/pdfium/+/39c6b4c50bb06336c2b592a407efa862ff6ed8ae

[aneeshm1, 2014-11-13 21:48:52]

aneeshm@google.com changed reviewers:
+ jam@chromium.org, nodir@chromium.org, palmer@google.com

[aneeshm1, 2014-11-13 21:49:28]

I need this change for the pdfium Buildbot to work.

PTAL.

[jam, 2014-11-13 21:57:52]

On 2014/11/13 21:49:28, aneeshm1 wrote:
> I need this change for the pdfium Buildbot to work.
> 
> PTAL.

lgtm

[aneeshm1, 2014-11-13 21:59:23]

Committed patchset #1 (id:1) manually as
39c6b4c50bb06336c2b592a407efa862ff6ed8ae (presubmit successful).