[Invalidation Tracking] Include DescendantInvalidationSet id in trace events

Source/core/inspector/InspectorTraceEvents.cpp

 // 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.
 
 #include "config.h"
 #include "core/inspector/InspectorTraceEvents.h"
 
 #include "bindings/core/v8/ScriptCallStackFactory.h"
 #include "bindings/core/v8/ScriptGCEvent.h"
 #include "bindings/core/v8/ScriptSourceCode.h"
@@ skipping 49 matching lines @@
 
 void setNodeInfo(TracedValue* value, Node* node, const char* idFieldName, const char* nameFieldName = 0)
 {
     value->setInteger(idFieldName, InspectorNodeIds::idForNode(node));
     if (nameFieldName)
         value->setString(nameFieldName, node->debugName());
 }
 
 }
 
+String descendantInvalidationSetToIdString(const DescendantInvalidationSet& set)
+{
+    return toHexString(&set);
+}
+
 const char InspectorStyleInvalidatorInvalidateEvent::ElementHasPendingInvalidationList[] = "Element has pending invalidation list";
 const char InspectorStyleInvalidatorInvalidateEvent::InvalidateCustomPseudo[] = "Invalidate custom pseudo element.";
 const char InspectorStyleInvalidatorInvalidateEvent::InvalidationSetMatchedAttribute[] = "Invalidation set matched attribute.";
 const char InspectorStyleInvalidatorInvalidateEvent::InvalidationSetMatchedClass[] = "Invalidation set matched class.";
 const char InspectorStyleInvalidatorInvalidateEvent::InvalidationSetMatchedId[] = "Invalidation set matched id.";
 const char InspectorStyleInvalidatorInvalidateEvent::InvalidationSetMatchedTagName[] = "Invalidation set matched tagName.";
 const char InspectorStyleInvalidatorInvalidateEvent::PreventStyleSharingForParent[] = "Prevent style sharing for parent.";
 
 PassRefPtr<TracedValue> InspectorStyleInvalidatorInvalidateEvent::fillCommonPart(Element& element, const char* reason)
 {
@@ skipping 383 matching lines @@
 
 PassRefPtr<TraceEvent::ConvertableToTraceFormat> InspectorTracingSessionIdForWorkerEvent::data(const String& sessionId, WorkerThread* workerThread)
 {
     RefPtr<TracedValue> value = TracedValue::create();
     value->setString("sessionId", sessionId);
     value->setDouble("workerThreadId", workerThread->platformThreadId());
     return value.release();
 }
 
 }