Fix counters in d8.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 9fc909ba9fb59173e2a18bade8553abe17dd412f..814a8f44ee52e11c25ee104b133808d6337a5017 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1269,8 +1269,11 @@ void Shell::Initialize(Isolate* isolate) {
     V8::SetAddHistogramSampleFunction(AddHistogramSample);
   }
 #endif  // V8_SHARED
-  if (options.test_shell) return;
+}
+
 
+void Shell::InitializeDebugger(Isolate* isolate) {
+  if (options.test_shell) return;
 #ifndef V8_SHARED
   Locker lock;
   HandleScope scope;
@@ -1897,8 +1900,9 @@ int Shell::Main(int argc, char* argv[]) {
   int result = 0;
   Isolate* isolate = Isolate::GetCurrent();
   {
-    Symbols symbols(isolate);
     Initialize(isolate);
+    Symbols symbols(isolate);
+    InitializeDebugger(isolate);
 
     if (options.stress_opt || options.stress_deopt) {
       Testing::SetStressRunType(options.stress_opt