This commit fixes some implicit declarations in the nICEr thirt-party component.
The fixes apply to mozilla's modifications of nICEr rather than nICEr upstream.
Also of note, Mozilla bug 1374699 contains fixes and changes that deal with
these in addition to many other isues in a future firefox version, and so this
patch will not be upstreamed but rather dropped when it becomes obsolete in
firefox-58 or 59.

--- a/media/mtransport/third_party/nICEr/src/ice/ice_component.c	2017-09-19 11:37:08.523492384 -0400
+++ b/media/mtransport/third_party/nICEr/src/ice/ice_component.c	2017-09-19 11:36:35.446559926 -0400
@@ -49,17 +49,16 @@
 #include "nr_socket_multi_tcp.h"
 #include "ice_reg.h"
 #include "nr_crypto.h"
 #include "r_time.h"
 
 static int nr_ice_component_stun_server_default_cb(void *cb_arg,nr_stun_server_ctx *stun_ctx,nr_socket *sock, nr_stun_server_request *req, int *dont_free, int *error);
 static int nr_ice_pre_answer_request_destroy(nr_ice_pre_answer_request **parp);
 void nr_ice_component_consent_schedule_consent_timer(nr_ice_component *comp);
-void nr_ice_component_consent_destroy(nr_ice_component *comp);
 
 /* This function takes ownership of the contents of req (but not req itself) */
 static int nr_ice_pre_answer_request_create(nr_transport_addr *dst, nr_stun_server_request *req, nr_ice_pre_answer_request **parp)
   {
     int r, _status;
     nr_ice_pre_answer_request *par = 0;
     nr_stun_message_attribute *attr;
 
--- a/media/mtransport/third_party/nICEr/src/ice/ice_component.h	2017-06-15 16:52:15.000000000 -0400
+++ b/media/mtransport/third_party/nICEr/src/ice/ice_component.h	2017-09-19 11:17:39.686074649 -0400
@@ -80,16 +80,17 @@
 
   STAILQ_ENTRY(nr_ice_component_)entry;
 };
 
 typedef STAILQ_HEAD(nr_ice_component_head_,nr_ice_component_) nr_ice_component_head;
 
 int nr_ice_component_create(struct nr_ice_media_stream_ *stream, int component_id, nr_ice_component **componentp);
 int nr_ice_component_destroy(nr_ice_component **componentp);
+void nr_ice_component_consent_destroy(nr_ice_component *comp);
 int nr_ice_component_initialize(struct nr_ice_ctx_ *ctx,nr_ice_component *component);
 int nr_ice_component_maybe_prune_candidate(nr_ice_ctx *ctx, nr_ice_component *comp, nr_ice_candidate *c1, int *was_pruned);
 int nr_ice_component_pair_candidate(nr_ice_peer_ctx *pctx, nr_ice_component *pcomp, nr_ice_candidate *lcand, int pair_all_remote);
 int nr_ice_component_pair_candidates(nr_ice_peer_ctx *pctx, nr_ice_component *lcomp, nr_ice_component *pcomp);
 int nr_ice_component_service_pre_answer_requests(nr_ice_peer_ctx *pctx, nr_ice_component *pcomp, char *username, int *serviced);
 int nr_ice_component_nominated_pair(nr_ice_component *comp, nr_ice_cand_pair *pair);
 int nr_ice_component_failed_pair(nr_ice_component *comp, nr_ice_cand_pair *pair);
 int nr_ice_component_check_if_failed(nr_ice_component *comp);
--- a/media/mtransport/third_party/nICEr/src/stun/stun_client_ctx.c	2017-09-19 11:32:38.697090275 -0400
+++ b/media/mtransport/third_party/nICEr/src/stun/stun_client_ctx.c	2017-09-19 11:32:27.491115380 -0400
@@ -39,16 +39,17 @@
 
 #include <nr_api.h>
 #include "stun.h"
 #include "async_timer.h"
 #include "registry.h"
 #include "stun_reg.h"
 #include "nr_crypto.h"
 #include "r_time.h"
+#include "ice_ctx.h"
 
 static int nr_stun_client_send_request(nr_stun_client_ctx *ctx);
 static void nr_stun_client_timer_expired_cb(NR_SOCKET s, int b, void *cb_arg);
 static int nr_stun_client_get_password(void *arg, nr_stun_message *msg, Data **password);
 
 #define NR_STUN_TRANSPORT_ADDR_CHECK_WILDCARD 1
 #define NR_STUN_TRANSPORT_ADDR_CHECK_LOOPBACK 2
 
--- a/media/mtransport/third_party/nICEr/src/stun/turn_client_ctx.c	2017-06-15 16:52:15.000000000 -0400
+++ b/media/mtransport/third_party/nICEr/src/stun/turn_client_ctx.c	2017-09-19 11:33:21.599994167 -0400
@@ -43,16 +43,17 @@
 #include <string.h>
 
 #include "nr_api.h"
 #include "r_time.h"
 #include "async_timer.h"
 #include "nr_socket_buffered_stun.h"
 #include "stun.h"
 #include "turn_client_ctx.h"
+#include "ice_ctx.h"
 
 int NR_LOG_TURN = 0;
 
 #define TURN_MAX_PENDING_BYTES 32000
 
 #define TURN_RTO 100  /* Hardcoded RTO estimate */
 #define TURN_LIFETIME_REQUEST_SECONDS    3600  /* One hour */
 #define TURN_USECS_PER_S                 1000000