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

remoting/jingle_glue/jingle_thread.h

 // Copyright (c) 2011 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_JINGLE_GLUE_JINGLE_THREAD_H_
 #define REMOTING_JINGLE_GLUE_JINGLE_THREAD_H_
 
 #include "base/message_loop.h"
 #include "base/tracked_objects.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 29 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JingleThreadMessageLoop);
 };
 
 // TODO(sergeyu): This class should be changed to inherit from Chromiums
 // base::Thread instead of libjingle's thread.
 class JingleThread : public talk_base::Thread {
  public:
   JingleThread();
   virtual ~JingleThread();
 
-  void Start();
+  bool Start();
 
   // Main function for the thread. Should not be called directly.
   virtual void Run() OVERRIDE;
 
   // Stop the thread.
   virtual void Stop() OVERRIDE;
 
   // Returns Chromiums message loop for this thread.
   MessageLoop* message_loop();
   base::MessageLoopProxy* message_loop_proxy();
 
   // Returns task pump if the thread is running, otherwise NULL is returned.
   TaskPump* task_pump();
 
  private:
   TaskPump* task_pump_;
   base::WaitableEvent started_event_;
   base::WaitableEvent stopped_event_;
   MessageLoop* message_loop_;
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(JingleThread);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_JINGLE_THREAD_H_