VM: Re-format to use at most one newline between functions

runtime/vm/object_graph_test.cc

Index: runtime/vm/object_graph_test.cc
diff --git a/runtime/vm/object_graph_test.cc b/runtime/vm/object_graph_test.cc
index 0056bee1d41af34a1f2391fe1ef0b70ecfaaa1ef..fb2329089956e7f544d044ac06dae58305bb94a2 100644
--- a/runtime/vm/object_graph_test.cc
+++ b/runtime/vm/object_graph_test.cc
@@ -2,8 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#include "platform/assert.h"
 #include "vm/object_graph.h"
+#include "platform/assert.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ -37,7 +37,6 @@ class CounterVisitor : public ObjectGraph::Visitor {
   RawObject* expected_parent_;
 };
 
-
 ISOLATE_UNIT_TEST_CASE(ObjectGraph) {
   Isolate* isolate = thread->isolate();
   // Create a simple object graph with objects a, b, c, d: