Add the URL attribute to cricket::Candiate.

webrtc/p2p/base/candidate.h

Index: webrtc/p2p/base/candidate.h
diff --git a/webrtc/p2p/base/candidate.h b/webrtc/p2p/base/candidate.h
index 5073aeb32212aec33a661da29ace6a562c47f1a7..1264db601508a54da9273394891dad7dea4ece10 100644
--- a/webrtc/p2p/base/candidate.h
+++ b/webrtc/p2p/base/candidate.h
@@ -161,7 +161,6 @@ class Candidate {
   const std::string& foundation() const {
     return foundation_;
   }
-
   void set_foundation(const std::string& foundation) {
     foundation_ = foundation;
   }
@@ -184,6 +183,10 @@ class Candidate {
     transport_name_ = transport_name;
   }
 
+  // The URL of ICE server which this candidate is gathered from.

[Taylor Brandstetter, 2017/02/10 01:58:45]

nit: Add "the" before "ICE server"

[Zhi Huang, 2017/02/10 06:45:50]

Done.

+  const std::string& url() const { return url_; }
+  void set_url(const std::string& url) { url_ = url; }
+
   // Determines whether this candidate is equivalent to the given one.
   bool IsEquivalent(const Candidate& c) const {
     // We ignore the network name, since that is just debug information, and
@@ -284,6 +287,7 @@ class Candidate {
   std::string transport_name_;
   uint16_t network_id_;
   uint16_t network_cost_;
+  std::string url_;
 };
 
 // Used during parsing and writing to map component to channel name