[Tracing] Embed V8 runtime call stats into tracing.

src/lookup.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/lookup.h"
 
 #include "src/bootstrapper.h"
 #include "src/deoptimizer.h"
 #include "src/elements.h"
 #include "src/field-type.h"
@@ skipping 398 matching lines @@
   if (IsElement()) {
     Handle<JSObject> object = Handle<JSObject>::cast(holder);
     ElementsAccessor* accessor = object->GetElementsAccessor();
     accessor->Delete(object, number_);
   } else {
     bool is_prototype_map = holder->map()->is_prototype_map();
     RuntimeCallTimerScope stats_scope(
         isolate_, is_prototype_map
                       ? &RuntimeCallStats::PrototypeObject_DeleteProperty
                       : &RuntimeCallStats::Object_DeleteProperty);
+    TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_SCOPED(
+        isolate_,
+        (is_prototype_map
+             ? &tracing::TraceEventStatsTable::PrototypeObject_DeleteProperty
+             : &tracing::TraceEventStatsTable::Object_DeleteProperty));
 
     PropertyNormalizationMode mode =
         is_prototype_map ? KEEP_INOBJECT_PROPERTIES : CLEAR_INOBJECT_PROPERTIES;
 
     if (holder->HasFastProperties()) {
       JSObject::NormalizeProperties(Handle<JSObject>::cast(holder), mode, 0,
                                     "DeletingProperty");
       ReloadPropertyInformation<false>();
     }
     // TODO(verwaest): Get rid of the name_ argument.
@@ skipping 402 matching lines @@
                                       : access_check_info->named_interceptor();
     if (interceptor) {
       return handle(InterceptorInfo::cast(interceptor), isolate_);
     }
   }
   return Handle<InterceptorInfo>();
 }
 
 }  // namespace internal
 }  // namespace v8