Add isolate event handler setup in order to be able to propagate isolate

bin/dbg_connection.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_DBG_CONNECTION_H_
 #define BIN_DBG_CONNECTION_H_
 
 #include "bin/builtin.h"
 #include "bin/utils.h"
 
@@ skipping 30 matching lines @@
  private:
   static void SendMsg(dart::TextBuffer* msg);
   static void QueueMsg(dart::TextBuffer* msg);
   static void SendQueuedMsgs();
 
   static void SendBreakpointEvent(Dart_StackTrace trace);
   static void SendExceptionEvent(Dart_Handle exception, Dart_StackTrace trace);
   static void BptResolvedHandler(intptr_t bp_id,
                                  Dart_Handle url,
                                  intptr_t line_number);
+  static void IsolateEventHandler(Dart_Isolate isolate, Dart_IsolateEvent kind);
   static void BreakpointHandler(Dart_Breakpoint bpt, Dart_StackTrace trace);
   static void ExceptionThrownHandler(Dart_Handle exception,
                                      Dart_StackTrace stack_trace);
 
   static void AcceptDbgConnection(int debug_fd);
   static void WaitForConnection();
   static void CloseDbgConnection();
 
   static void HandleMessages();
   static void HandleResumeCmd(const char* msg);
@@ skipping 39 matching lines @@
 
   static MessageBuffer* msgbuf_;
 
   friend class DebuggerConnectionImpl;
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(DebuggerConnectionHandler);
 };
 
 #endif  // BIN_DBG_CONNECTION_H_