[Isolates] Fix debugger and termination APIs callable from other threads.

include/v8.h

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2925 matching lines @@
    * continue the propagation of the termination exception if needed.
    *
    * The thread id passed to TerminateExecution must have been
    * obtained by calling GetCurrentThreadId on the thread in question.
    *
    * \param thread_id The thread id of the thread to terminate.
    */
   static void TerminateExecution(int thread_id);
 
   /**
-   * Forcefully terminate the current thread of JavaScript execution.
+   * Forcefully terminate the current thread of JavaScript execution
+   * in the given isolate. If no isolate is provided, the default
+   * isolate is used.
    *
    * This method can be used by any thread even if that thread has not
    * acquired the V8 lock with a Locker object.
+   *
+   * \param isolate The isolate in which to terminate the current JS execution.
    */
-  static void TerminateExecution();
+  static void TerminateExecution(Isolate* isolate = NULL);
 
   /**
    * Is V8 terminating JavaScript execution.
    *
    * Returns true if JavaScript execution is currently terminating
    * because of a call to TerminateExecution.  In that case there are
    * still JavaScript frames on the stack and the termination
    * exception is still active.
    */
   static bool IsExecutionTerminating();
@@ skipping 1004 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_