Expose function CheckDebugBreak in the debugger api

include/v8-debug.h

 // Copyright 2008 the V8 project 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 V8_V8_DEBUG_H_
 #define V8_V8_DEBUG_H_
 
 #include "v8.h"
 
 /**
@@ skipping 149 matching lines @@
                                     Handle<Value> data = Handle<Value>());
 
   // Schedule a debugger break to happen when JavaScript code is run
   // in the given isolate.
   static void DebugBreak(Isolate* isolate);
 
   // Remove scheduled debugger break in given isolate if it has not
   // happened yet.
   static void CancelDebugBreak(Isolate* isolate);
 
+  // Check if a debugger break is scheduled in the given isolate.
+  static bool CheckDebugBreak(Isolate* isolate);
+
   // Break execution of JavaScript in the given isolate (this method
   // can be invoked from a non-VM thread) for further client command
   // execution on a VM thread. Client data is then passed in
   // EventDetails to EventCallback2 at the moment when the VM actually
   // stops.
   static void DebugBreakForCommand(Isolate* isolate, ClientData* data);
 
   // Message based interface. The message protocol is JSON.
   static void SetMessageHandler(MessageHandler handler);
 
@@ skipping 78 matching lines @@
 };
 
 
 }  // namespace v8
 
 
 #undef EXPORT
 
 
 #endif  // V8_V8_DEBUG_H_