Make ConnectionToClient and ClientSession not ref-counted.

remoting/protocol/jingle_session_unittest.cc

Index: remoting/protocol/jingle_session_unittest.cc
diff --git a/remoting/protocol/jingle_session_unittest.cc b/remoting/protocol/jingle_session_unittest.cc
index f96f03876e13a8a3cb5090a47027355596b8e454..526151f28ca45d229d64a531ed4455a76555178b 100644
--- a/remoting/protocol/jingle_session_unittest.cc
+++ b/remoting/protocol/jingle_session_unittest.cc
@@ -230,7 +230,7 @@ class JingleSessionTest : public testing::Test {
         // Expect that the connection will be closed eventually.
         EXPECT_CALL(host_connection_callback_,
                     OnStateChange(Session::CLOSED))
-            .Times(1);
+            .Times(AtMost(1));
       } else {
         // Might pass through the CONNECTED state.
         EXPECT_CALL(host_connection_callback_,
@@ -272,7 +272,7 @@ class JingleSessionTest : public testing::Test {
       // Expect that the connection will be closed eventually.
       EXPECT_CALL(client_connection_callback_,
                   OnStateChange(Session::CLOSED))
-          .Times(1);
+          .Times(AtMost(1));
     }
 
     client_session_.reset(client_server_->Connect(