Don't crash in ~HostNPScriptObject() when the object wasn't initialized.

remoting/host/plugin/host_script_object.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_
 #define REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 176 matching lines @@
   std::string access_code_;
   base::TimeDelta access_code_lifetime_;
 
   std::string client_username_;
   ScopedRefNPObject log_debug_info_func_;
   ScopedRefNPObject on_nat_traversal_policy_changed_func_;
   ScopedRefNPObject on_state_changed_func_;
   base::PlatformThreadId np_thread_id_;
   scoped_refptr<PluginMessageLoopProxy> plugin_message_loop_proxy_;
 
-  ChromotingHostContext host_context_;
+  scoped_ptr<ChromotingHostContext> host_context_;
   HostKeyPair host_key_pair_;
   scoped_ptr<SignalStrategy> signal_strategy_;
   scoped_ptr<RegisterSupportHostRequest> register_request_;
   scoped_ptr<LogToServer> log_to_server_;
   scoped_ptr<DesktopEnvironment> desktop_environment_;
   scoped_ptr<It2MeHostUserInterface> it2me_host_user_interface_;
 
   scoped_refptr<ChromotingHost> host_;
   int failed_login_attempts_;
 
@@ skipping 22 matching lines @@
   // On startup, it is possible to have Connect() called before the policy read
   // is completed.  Rather than just failing, we thunk the connection call so
   // it can be executed after at least one successful policy read. This
   // variable contains the thunk if it is necessary.
   base::Closure pending_connect_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_