Add sfntly library for font subsetting used in print preview.

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 5b926def8ec754225ec01ecf69ad15dbd00db50e..dd7a970d09517a382be99034355fff1fe4054b57 100644
--- a/DEPS
+++ b/DEPS
@@ -21,6 +21,7 @@ vars = {
   "libjingle_revision": "73",
   "libvpx_revision": "90416",
   "ffmpeg_revision": "91042",
+  "sfntly_revision": "9",
   "skia_revision": "1850",
   "v8_revision": "8670",
   "webrtc_revision": "108",
@@ -98,6 +99,10 @@ deps = {
     Var("nacl_trunk") + "/src/native_client/tests/prebuilt@" +
     Var("nacl_revision"),
 
+  "src/third_party/sfntly/src/sfntly":
+    (Var("googlecode_url") % "sfntly") + "/trunk/cpp/src/sfntly@" +
+    Var("sfntly_revision"),
+
   "src/third_party/skia/gpu":
     (Var("googlecode_url") % "skia") + "/trunk/gpu@" + Var("skia_revision"),