Isolate::PrintStack: restore default verbose object printing

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 3d8f4492027b93983fc55755c04904751bdcc4e1..f1b8c474a81c486a816d500dd88870a336b0c2da 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -5388,7 +5388,7 @@ void Heap::RecordStats(HeapStats* stats, bool take_snapshot) {
     GetFromRingBuffer(stats->last_few_messages);
   if (stats->js_stacktrace != NULL) {
     FixedStringAllocator fixed(stats->js_stacktrace, kStacktraceBufferSize - 1);
-    StringStream accumulator(&fixed);
+    StringStream accumulator(&fixed, StringStream::kPrintObjectConcise);
     isolate()->PrintStack(&accumulator, Isolate::kPrintStackVerbose);
   }
 }