[turbofan] Enforce native context specialization.

test/unittests/compiler/graph-unittest.cc

Index: test/unittests/compiler/graph-unittest.cc
diff --git a/test/unittests/compiler/graph-unittest.cc b/test/unittests/compiler/graph-unittest.cc
index e562e511ec148ea85b70f9aed6d9c15125b10b6c..7fa8bc328d4e390eaeb217bc8a9cea2e3a9cd171 100644
--- a/test/unittests/compiler/graph-unittest.cc
+++ b/test/unittests/compiler/graph-unittest.cc
@@ -13,7 +13,11 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-GraphTest::GraphTest(int num_parameters) : common_(zone()), graph_(zone()) {
+GraphTest::GraphTest(int num_parameters)
+    : TestWithNativeContext(),
+      TestWithIsolateAndZone(),
+      common_(zone()),
+      graph_(zone()) {
   graph()->SetStart(graph()->NewNode(common()->Start(num_parameters)));
   graph()->SetEnd(graph()->NewNode(common()->End(1), graph()->start()));
 }