DevTools Timeline: expose HitTest event

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 0a971add9f7c62419e6385ecc58c914c75885d5e..c467dfcc5d0856db6576bee972d700716d6d322b 100644
--- a/Source/core/inspector/InspectorTraceEvents.h
+++ b/Source/core/inspector/InspectorTraceEvents.h
@@ -23,6 +23,9 @@ class Event;
 class ExecutionContext;
 class FrameView;
 class GraphicsLayer;
+class HitTestLocation;
+class HitTestRequest;
+class HitTestResult;
 class ImageResource;
 class KURL;
 class DeprecatedPaintLayer;
@@ -341,6 +344,11 @@ public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const Animation&);
 };
 
+class InspectorHitTestEvent {
+public:
+    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> endData(const HitTestRequest&, const HitTestLocation&, const HitTestResult&);
+};
+
 CORE_EXPORT String toHexString(const void* p);
 CORE_EXPORT void setCallStack(TracedValue*);