Support Promises event-based instrumentation on backend.

Source/core/inspector/ScriptDebugListener.h

Index: Source/core/inspector/ScriptDebugListener.h
diff --git a/Source/core/inspector/ScriptDebugListener.h b/Source/core/inspector/ScriptDebugListener.h
index 0a38a4c1a2925b06be545e0e5cd6236ce39a77f3..58d7045b1b1dabf9e5b809793cf469c5118ac6be 100644
--- a/Source/core/inspector/ScriptDebugListener.h
+++ b/Source/core/inspector/ScriptDebugListener.h
@@ -80,6 +80,9 @@ public:
     virtual SkipPauseRequest didPause(ScriptState*, const ScriptValue& callFrames, const ScriptValue& exception, const Vector<String>& hitBreakpoints) = 0;
     virtual void didContinue() = 0;
     virtual void didReceiveV8AsyncTaskEvent(ExecutionContext*, const String& eventType, const String& eventName, int id) = 0;
+    virtual void didReceiveV8NewPromiseEvent(ExecutionContext*, v8::Handle<v8::Object> promise) = 0;
+    virtual void didReceiveV8UpdatePromiseEvent(ExecutionContext*, v8::Handle<v8::Object> promise, int status, v8::Handle<v8::Value>) = 0;
+    virtual void didReceiveV8ChainPromiseEvent(ExecutionContext*, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise) = 0;
 };
 
 } // namespace blink