Add a new HappyEyeballsConnectionImpl class

source/common/network/BUILD

@@ -98,6 +98,16 @@ envoy_cc_library(
     ],
 )
 
+envoy_cc_library(
+    name = "happy_eyeballs_connection_impl_lib",
+    srcs = ["happy_eyeballs_connection_impl.cc"],
+    hdrs = ["happy_eyeballs_connection_impl.h"],
+    deps = [
+        ":connection_base_lib",
+        ":connection_lib",
+    ],
+)
+
 envoy_cc_library(
     name = "apple_dns_lib",
     srcs = select({

source/common/network/connection_impl.h

@@ -22,6 +22,8 @@ class TestPauseFilter;
 
 namespace Network {
 
+class HappyEyeballsConnectionImpl;
+
 /**
  * Utility functions for the connection implementation.
  */
@@ -168,6 +170,7 @@ class ConnectionImpl : public ConnectionImplBase, public TransportSocketCallback
   bool bind_error_{false};
 
 private:
+  friend class HappyEyeballsConnectionImpl;
   friend class Envoy::RandomPauseFilter;
   friend class Envoy::TestPauseFilter;