[Chromoting] Make ChromotingHost's dependency on libjingle injected, instead of hard-coded.

remoting/host/remoting_me2me_host.cc

Index: remoting/host/remoting_me2me_host.cc
diff --git a/remoting/host/remoting_me2me_host.cc b/remoting/host/remoting_me2me_host.cc
index 30d44dc7edc94b0a5f7a744ad5d6ae56bc326c2b..bcb3cf4b7cb59f7aa0b5586c3dd43a39c76ef416 100644
--- a/remoting/host/remoting_me2me_host.cc
+++ b/remoting/host/remoting_me2me_host.cc
@@ -33,6 +33,7 @@
 #include "remoting/host/host_config.h"
 #include "remoting/host/host_event_logger.h"
 #include "remoting/host/host_user_interface.h"
+#include "remoting/host/jingle_session_manager_factory.h"
 #include "remoting/host/json_host_config.h"
 #include "remoting/host/log_to_server.h"
 #include "remoting/host/policy_hack/nat_policy.h"
@@ -382,6 +383,7 @@ class HostProcess
 
     host_ = new ChromotingHost(
         context_.get(), signal_strategy_.get(), desktop_environment_.get(),
+        scoped_ptr<SessionManagerFactory>(new JingleSessionManagerFactory()),
         network_settings);
 
     heartbeat_sender_.reset(new HeartbeatSender(