jscntxt.h(796): warning C4099: 'js::TraceMonitor' : type name first seen using 'class' now seen using 'struct', see jsprvtd.h(158), r=jorendorff

js/src/jsprvtd.h

@@ -156,7 +156,7 @@ class ExecuteArgsGuard;
 class InvokeFrameGuard;
 class InvokeArgsGuard;
 class TraceRecorder;
-class TraceMonitor;
+struct TraceMonitor;
 class StackSpace;
 class CallStack;