[Invalidation Tracking] Include DescendantInvalidationSet id in trace events

Source/core/inspector/InspectorTraceEvents.h

 // Copyright 2014 The Chromium 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 InspectorTraceEvents_h
 #define InspectorTraceEvents_h
 
 #include "platform/EventTracer.h"
 #include "platform/TraceEvent.h"
 #include "platform/heap/Handle.h"
@@ skipping 27 matching lines @@
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> beginData(FrameView*);
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> endData(RenderObject* rootForThisLayout);
 };
 
 class InspectorStyleRecalcInvalidationTrackingEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(Node*, const StyleChangeReasonForTracing&);
 };
 
+String descendantInvalidationSetToIdString(const DescendantInvalidationSet&);
+
 class InspectorStyleInvalidatorInvalidateEvent {
 public:
     static const char ElementHasPendingInvalidationList[];
     static const char InvalidateCustomPseudo[];
     static const char InvalidationSetMatchedAttribute[];
     static const char InvalidationSetMatchedClass[];
     static const char InvalidationSetMatchedId[];
     static const char InvalidationSetMatchedTagName[];
     static const char PreventStyleSharingForParent[];
 
@@ skipping 164 matching lines @@
 
 class InspectorTracingSessionIdForWorkerEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const String& sessionId, WorkerThread*);
 };
 
 } // namespace blink
 
 
 #endif // !defined(InspectorTraceEvents_h)