Support counter graphs in Timeline based on trace events

Source/bindings/v8/V8GCController.cpp

Index: Source/bindings/v8/V8GCController.cpp
diff --git a/Source/bindings/v8/V8GCController.cpp b/Source/bindings/v8/V8GCController.cpp
index 647a4aa4487d511b5d3bd074ec0c095135fe9013..b09bfe742a311bd94d7e0b1af9f3bd97cd9f56db 100644
--- a/Source/bindings/v8/V8GCController.cpp
+++ b/Source/bindings/v8/V8GCController.cpp
@@ -410,7 +410,7 @@ void V8GCController::gcEpilogue(v8::GCType type, v8::GCCallbackFlags flags)
     }
 
     TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "GCEvent", "usedHeapSizeAfter", usedHeapSize(isolate));
-    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "", InspectorUpdateCountersEvent::data());
+    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());
 }
 
 void V8GCController::minorGCEpilogue(v8::Isolate* isolate)