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

DEPS

 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
+  "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "97838",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
   "nacl_revision": "6965",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   # TODO(brettw) We should use the "From" syntax to avoid hardcoding the
   # revisions here, but it makes checkdeps confused. We should fix checkdeps.
@@ skipping 10 matching lines @@
       "596aa5b812ec4b24160ed7ce55b3fd141f929fbf",
   "nacl_toolchain_revision": "6757",
 
   "libjingle_revision": "88",
   "libvpx_revision": "103347",
   "ffmpeg_revision": "106016",
   "sfntly_revision": "98",
   "skia_revision": "2506",
   "v8_revision": "9637",
   "webrtc_revision": "779",
+  "jsoncpp_revision": "246",
 
   # Note: On most bots, clang is not checked out via DEPS but by
   # tools/clang/scripts/update.sh. The script reads this line here.
   # Do NOT CHANGE this if you don't know what you're doing -- see
   # http://code.google.com/p/chromium/wiki/UpdatingClang
   "clang_revision": "142072",
 }
 
 deps = {
   "src/breakpad/src":
@@ skipping 224 matching lines @@
     # TODO(brettw) enable the From() line instead when checkdeps is fixed.
     #From("src/native_client", "native_client/src/third_party/pylib"),
     Var("nacl_trunk") + "/src/third_party/pylib@" + Var("nacl_tools_revision"),
   "src/third_party/scons-2.0.1":
     Var("nacl_trunk") + "/src/third_party/scons-2.0.1@" +
         Var("nacl_tools_revision"),
 
   "src/third_party/webrtc":
     (Var("googlecode_url") % "webrtc") + "/trunk/src@" + Var("webrtc_revision"),
 
+  "src/third_party/jsoncpp/source/include":
+    (Var("sourceforge_url") % {"repo": "jsoncpp"}) +
+        "/trunk/jsoncpp/include@" + Var("jsoncpp_revision"),
+
+  "src/third_party/jsoncpp/source/src/lib_json":
+    (Var("sourceforge_url") % {"repo": "jsoncpp"}) +
+        "/trunk/jsoncpp/src/lib_json@" + Var("jsoncpp_revision"),
+
   "src/third_party/mozc/session":
     (Var("googlecode_url") % "mozc") + "/trunk/src/session@58",
 
   "src/third_party/smhasher/src":
     (Var("googlecode_url") % "smhasher") + "/trunk@136",
 }
 
 
 deps_os = {
   "win": {
@@ skipping 147 matching lines @@
     # which takes ~20s, but clang speeds up builds by more than 20s.
     "pattern": ".",
     "action": ["python", "src/tools/clang/scripts/update.py", "--mac-only"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]