Split nodes and edges into separate arrays in heap profiler.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 0bc93c2ff252635e7d5fe4dafcb2b8b06f63eb7d..52a84edfdabf6e797b3d87cd1b2786eb6bfdd5a2 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -6063,7 +6063,7 @@ const HeapGraphEdge* HeapGraphNode::GetChild(int index) const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetChild");
   return reinterpret_cast<const HeapGraphEdge*>(
-      &ToInternal(this)->children()[index]);
+      ToInternal(this)->children()[index]);
 }
 
 
@@ -6157,7 +6157,7 @@ const HeapGraphNode* HeapSnapshot::GetNodeById(SnapshotObjectId id) const {
 int HeapSnapshot::GetNodesCount() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetNodesCount");
-  return ToInternal(this)->entries()->length();
+  return ToInternal(this)->entries().length();
 }
 
 
@@ -6165,7 +6165,7 @@ const HeapGraphNode* HeapSnapshot::GetNode(int index) const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetNode");
   return reinterpret_cast<const HeapGraphNode*>(
-      ToInternal(this)->entries()->at(index));
+      &ToInternal(this)->entries().at(index));
 }