Add host callback for debug break....

include/v8-debug.h

Index: include/v8-debug.h
===================================================================
--- include/v8-debug.h	(revision 1312)
+++ include/v8-debug.h	(working copy)
@@ -99,13 +99,24 @@
  *
  * \param message the debug message
  * \param length length of the message
+ * \param data the data value passed when registering the message handler
  * A DebugMessageHandler does not take posession of the message string,
  * and must not rely on the data persisting after the handler returns.
  */
 typedef void (*DebugMessageHandler)(const uint16_t* message, int length,
                                     void* data);
 
+/**
+ * Debug host dispatch callback function.
+ *
+ * \param dispatch the dispatch value
+ * \param data the data value passed when registering the dispatch handler
+ */
+typedef void (*DebugHostDispatchHandler)(void* dispatch,
+                                         void* data);
 
+
+
 class EXPORT Debug {
  public:
   // Set a C debug event listener.
@@ -123,6 +134,11 @@
   static void SetMessageHandler(DebugMessageHandler handler, void* data = NULL);
   static void SendCommand(const uint16_t* command, int length);
 
+  // Dispatch interface.
+  static void SetHostDispatchHandler(DebugHostDispatchHandler handler,
+                                     void* data = NULL);
+  static void SendHostDispatch(void* dispatch);
+
  /**
   * Run a JavaScript function in the debugger.
   * \param fun the function to call