Eliminate zero count allocations from profile

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index c8e918d1226d54d77be4f3852bcc770c12e6ae75..eeb722c7fb5e405544be8c363dc21fa3bb6c5827 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -2875,6 +2875,15 @@ static const v8::AllocationProfile::Node* FindAllocationProfileNode(
   return node;
 }
 
+static void CheckNoZeroCountNodes(v8::AllocationProfile::Node* node) {
+  for (auto alloc : node->allocations) {
+    CHECK_GT(alloc.count, 0u);
+  }
+  for (auto child : node->children) {
+    CheckNoZeroCountNodes(child);
+  }
+}
+
 TEST(SamplingHeapProfiler) {
   v8::HandleScope scope(v8::Isolate::GetCurrent());
   LocalContext env;
@@ -3002,6 +3011,8 @@ TEST(SamplingHeapProfiler) {
         heap_profiler->GetAllocationProfile());
     CHECK(!profile.is_empty());
 
+    CheckNoZeroCountNodes(profile->GetRootNode());
+
     heap_profiler->StopSamplingHeapProfiler();
   }
 }