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

remoting/protocol/protocol_mock_objects.h

Index: remoting/protocol/protocol_mock_objects.h
diff --git a/remoting/protocol/protocol_mock_objects.h b/remoting/protocol/protocol_mock_objects.h
index 2ebbf5895d32ac6db9d9d72d3b244e40d853dedb..df22696738cead707abb526052845252a90764e2 100644
--- a/remoting/protocol/protocol_mock_objects.h
+++ b/remoting/protocol/protocol_mock_objects.h
@@ -17,6 +17,7 @@
 #include "remoting/protocol/host_stub.h"
 #include "remoting/protocol/input_stub.h"
 #include "remoting/protocol/session.h"
+#include "remoting/protocol/session_manager.h"
 #include "remoting/protocol/transport.h"
 #include "remoting/protocol/video_stub.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -176,6 +177,39 @@ class MockSession : public Session {
   DISALLOW_COPY_AND_ASSIGN(MockSession);
 };
 
+class MockSessionManager : public SessionManager {
+ public:
+  MockSessionManager();
+  virtual ~MockSessionManager();
+
+  MOCK_METHOD2(Init, void(SignalStrategy*, Listener*));
+  MOCK_METHOD4(ConnectPtr, Session*(
+      const std::string&,
+      Authenticator*,
+      CandidateSessionConfig*,
+      const Session::StateChangeCallback&));
+  MOCK_METHOD0(Close, void());
+  MOCK_METHOD1(set_authenticator_factory_ptr, void(AuthenticatorFactory*));
+  virtual scoped_ptr<Session> Connect(
+      const std::string& host_jid,
+      scoped_ptr<Authenticator> authenticator,
+      scoped_ptr<CandidateSessionConfig> config,
+      const Session::StateChangeCallback& state_change_callback) {
+    return scoped_ptr<Session>(ConnectPtr(
+        host_jid,
+        authenticator.get(),
+        config.get(),
+        state_change_callback));
+  };
+  virtual void set_authenticator_factory(
+      scoped_ptr<AuthenticatorFactory> authenticator_factory) {
+    set_authenticator_factory_ptr(authenticator_factory.release());
+  };
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockSessionManager);
+};
+
 }  // namespace protocol
 }  // namespace remoting