Support Promises event-based instrumentation on backend.

Source/bindings/core/v8/ScriptDebugServer.h

 /*
  * Copyright (c) 2010, Google Inc. 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
@@ skipping 135 matching lines @@
         FastAsyncScopes,
         NoScopes // Should be the last option.
     };
 
     ScriptValue currentCallFramesInner(ScopeInfoDetails);
 
     PassRefPtrWillBeRawPtr<JavaScriptCallFrame> wrapCallFrames(int maximumLimit, ScopeInfoDetails);
 
     void handleV8AsyncTaskEvent(ScriptDebugListener*, ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Object> eventData);
 
+    void handleV8PromiseEvent(ScriptDebugListener*, ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Object> eventData);
+
     bool m_runningNestedMessageLoop;
 };
 
 } // namespace blink
 
 
 #endif // ScriptDebugServer_h