Add a flag for printf debugging the compiler dispatcher

src/compiler-dispatcher/compiler-dispatcher-tracer.h

Index: src/compiler-dispatcher/compiler-dispatcher-tracer.h
diff --git a/src/compiler-dispatcher/compiler-dispatcher-tracer.h b/src/compiler-dispatcher/compiler-dispatcher-tracer.h
index 1781bb705efe99a5336072f352d188dc9106c0de..3751d0da5459031939e6136668c6c6287733386f 100644
--- a/src/compiler-dispatcher/compiler-dispatcher-tracer.h
+++ b/src/compiler-dispatcher/compiler-dispatcher-tracer.h
@@ -73,6 +73,8 @@ class V8_EXPORT_PRIVATE CompilerDispatcherTracer {
   double EstimateCompileInMs(size_t ast_size_in_bytes) const;
   double EstimateFinalizeCompilingInMs() const;
 
+  void DumpStatistics() const;
+
  private:
   static double Average(const base::RingBuffer<double>& buffer);
   static double Estimate(