Revert of Removing references to webrtc::PortAllocatorFactoryInterface.

content/renderer/p2p/port_allocator.h

Index: content/renderer/p2p/port_allocator.h
diff --git a/content/renderer/p2p/port_allocator.h b/content/renderer/p2p/port_allocator.h
index e84367650963b54eefe4db7dda50fbfeb0607b15..28ebf942d6ea011679425603504699e24b7d8129 100644
--- a/content/renderer/p2p/port_allocator.h
+++ b/content/renderer/p2p/port_allocator.h
@@ -12,11 +12,31 @@
 
 namespace content {
 
+class P2PPortAllocatorSession;
 class P2PSocketDispatcher;
 
 class P2PPortAllocator : public cricket::BasicPortAllocator {
  public:
   struct Config {
+    Config();
+    ~Config();
+
+    struct RelayServerConfig {
+      RelayServerConfig();
+      ~RelayServerConfig();
+
+      std::string username;
+      std::string password;
+      std::string server_address;
+      int port;
+      std::string transport_type;
+      bool secure;
+    };
+
+    std::set<rtc::SocketAddress> stun_servers;
+
+    std::vector<RelayServerConfig> relays;
+
     // Enable non-proxied UDP-based transport when set to true. When set to
     // false, it effectively disables all UDP traffic until UDP-supporting proxy
     // RETURN is available in the future.
@@ -44,7 +64,14 @@
       const scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   ~P2PPortAllocator() override;
 
+  cricket::PortAllocatorSession* CreateSessionInternal(
+      const std::string& content_name,
+      int component,
+      const std::string& ice_username_fragment,
+      const std::string& ice_password) override;
+
  private:
+  friend class P2PPortAllocatorSession;
   scoped_ptr<rtc::NetworkManager> network_manager_;
   scoped_refptr<P2PSocketDispatcher> socket_dispatcher_;
   Config config_;
@@ -58,6 +85,26 @@
   DISALLOW_COPY_AND_ASSIGN(P2PPortAllocator);
 };
 
+class P2PPortAllocatorSession : public cricket::BasicPortAllocatorSession {
+ public:
+  P2PPortAllocatorSession(
+      P2PPortAllocator* allocator,
+      const std::string& content_name,
+      int component,
+      const std::string& ice_username_fragment,
+      const std::string& ice_password);
+  ~P2PPortAllocatorSession() override;
+
+ protected:
+  // Overrides for cricket::BasicPortAllocatorSession.
+  void GetPortConfigurations() override;
+
+ private:
+  P2PPortAllocator* allocator_;
+
+  DISALLOW_COPY_AND_ASSIGN(P2PPortAllocatorSession);
+};
+
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_P2P_PORT_ALLOCATOR_H_