Add jsoncpp in DEPS and the gyp file to build jsoncpp in chromium.

The jsoncpp is needed by libjingle as part of the webrtc effort. This patch probably not be the best solution as there's already one chrome json parser in base and another jsoncpp copy in native_client. However since the libjingle can depend on neither of them, here comes this patch. We hope to take this patch as a chance to get some advices on how should we handle this case.



Review URL:

git-svn-id: 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed
tree: 760e52727a6a4f30544c4b69204a0626819a6b1e
  2. README.chromium
  3. jsoncpp.gyp