Pepper: Remove jsoncpp from trusted plugin.

Now that manifest parsing has been moved to components/nacl, the trusted plugin
no longer depends on jsoncpp.

BUG=239656
R=dmichael@chromium.org

Review URL: https://codereview.chromium.org/291173007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272174 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed