Add missing dependencies to the static library.

These missing deps were causing linker errors as reported on
https://groups.google.com/forum/#!topic/discuss-webrtc/wYrjr-LAkmg.

Bug: None
Change-Id: I2b1e80c188bcf45f299d14fd19c5775f23dc8463
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/148073
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29424}
diff --git a/BUILD.gn b/BUILD.gn
index 32fcfa2..31cf726 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -399,11 +399,14 @@
 
     deps = [
       ":webrtc_common",
+      "api:create_peerconnection_factory",
       "api:libjingle_peerconnection_api",
       "api:rtc_error",
       "api:transport_api",
       "api/crypto",
       "api/rtc_event_log:rtc_event_log_factory",
+      "api/task_queue",
+      "api/task_queue:default_task_queue_factory",
       "audio",
       "call",
       "common_audio",