Cleanup error handling in the client plugin.

remoting/protocol/fake_session.h

Index: remoting/protocol/fake_session.h
diff --git a/remoting/protocol/fake_session.h b/remoting/protocol/fake_session.h
index 7ae3a06e6ed79c96349624261409b8a74e077c22..af3f0c456fcf0e0828f69f0df61d4ec24dfd78a5 100644
--- a/remoting/protocol/fake_session.h
+++ b/remoting/protocol/fake_session.h
@@ -140,7 +140,7 @@ class FakeSession : public Session {
     message_loop_ = message_loop;
   }
 
-  void set_error(Session::Error error) { error_ = error; }
+  void set_error(ErrorCode error) { error_ = error; }
 
   bool is_closed() const { return closed_; }
 
@@ -154,7 +154,7 @@ class FakeSession : public Session {
   virtual void SetRouteChangeCallback(
       const RouteChangeCallback& callback) OVERRIDE;
 
-  virtual Session::Error error() OVERRIDE;
+  virtual ErrorCode error() OVERRIDE;
 
   virtual void CreateStreamChannel(
       const std::string& name, const StreamChannelCallback& callback) OVERRIDE;
@@ -182,7 +182,7 @@ class FakeSession : public Session {
 
   std::string jid_;
 
-  Session::Error error_;
+  ErrorCode error_;
   bool closed_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSession);