Remove candidates when doing continual gathering

talk/app/webrtc/jsepicecandidate.cc

Index: talk/app/webrtc/jsepicecandidate.cc
diff --git a/talk/app/webrtc/jsepicecandidate.cc b/talk/app/webrtc/jsepicecandidate.cc
index 768bd0a281bc3ee7097a116f00e3e4cc677c8644..091832c40d4c403a97b8e9989af60fd42df44faa 100644
--- a/talk/app/webrtc/jsepicecandidate.cc
+++ b/talk/app/webrtc/jsepicecandidate.cc
@@ -96,4 +96,14 @@ bool JsepCandidateCollection::HasCandidate(
   return ret;
 }
 
+int JsepCandidateCollection::remove(const IceCandidateInterface* candidate) {
+  size_t original_size = candidates_.size();
+  auto new_end = std::remove_if(
+      candidates_.begin(), candidates_.end(), [candidate](JsepIceCandidate* c) {
+        return candidate->candidate().MatchesForRemoval(c->candidate());
+      });
+  candidates_.erase(new_end, candidates_.end());
+  return candidates_.size() - original_size;

[Taylor Brandstetter, 2016/02/10 21:58:08]

This will return a negative number, is that right?

[honghaiz3, 2016/02/12 00:56:55]

Thanks for the good catch. 

+}
+
 }  // namespace webrtc