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

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index 44eaed371a03147a249440f27189ed5bfdd867f0..630218a650948ac782849b900ae8458bdc636a9f 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -20,9 +20,8 @@
 #include "remoting/host/host_status_observer.h"
 #include "remoting/host/mouse_move_observer.h"
 #include "remoting/host/network_settings.h"
+#include "remoting/host/session_manager_factory.h"
 #include "remoting/host/ui_strings.h"
-#include "remoting/jingle_glue/jingle_thread.h"
-#include "remoting/jingle_glue/signal_strategy.h"
 #include "remoting/protocol/authenticator.h"
 #include "remoting/protocol/session_manager.h"
 #include "remoting/protocol/connection_to_client.h"
@@ -74,6 +73,7 @@ class ChromotingHost : public base::RefCountedThreadSafe<ChromotingHost>,
   ChromotingHost(ChromotingHostContext* context,
                  SignalStrategy* signal_strategy,
                  DesktopEnvironment* environment,
+                 scoped_ptr<SessionManagerFactory> session_manager_factory,
                  const NetworkSettings& network_settings);
 
   // Asynchronously start the host process.
@@ -184,6 +184,7 @@ class ChromotingHost : public base::RefCountedThreadSafe<ChromotingHost>,
   // Parameters specified when the host was created.
   ChromotingHostContext* context_;
   DesktopEnvironment* desktop_environment_;
+  scoped_ptr<SessionManagerFactory> session_manager_factory_;
   NetworkSettings network_settings_;
 
   // Connection objects.