Sibling invalidation sets

Source/core/inspector/InspectorTraceEvents.h

Index: Source/core/inspector/InspectorTraceEvents.h
diff --git a/Source/core/inspector/InspectorTraceEvents.h b/Source/core/inspector/InspectorTraceEvents.h
index 62b9d77f9afea4f01d73231da2aad4fadb941842..bfdf4c8fd0082456c63d4088003b085b824385c3 100644
--- a/Source/core/inspector/InspectorTraceEvents.h
+++ b/Source/core/inspector/InspectorTraceEvents.h
@@ -44,6 +44,8 @@ class TracedValue;
 class WorkerThread;
 class XMLHttpRequest;
 
+using InvalidationSetVector = WillBeHeapVector<RefPtrWillBeMember<DescendantInvalidationSet>, 8>;
+
 class InspectorLayoutEvent {
     STATIC_ONLY(InspectorLayoutEvent);
 public:
@@ -97,7 +99,7 @@ public:
 
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(Element&, const char* reason);
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> selectorPart(Element&, const char* reason, const DescendantInvalidationSet&, const String&);
-    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> invalidationList(Element&, const WillBeHeapVector<RefPtrWillBeMember<DescendantInvalidationSet> >&);
+    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> invalidationList(Element&, const InvalidationSetVector&);
 
 private:
     static PassRefPtr<TracedValue> fillCommonPart(Element&, const char* reason);