Remove the dependency of Zone on Isolate

test/cctest/compiler/test-control-reducer.cc

Index: test/cctest/compiler/test-control-reducer.cc
diff --git a/test/cctest/compiler/test-control-reducer.cc b/test/cctest/compiler/test-control-reducer.cc
index 61dad29f11e31d0054720d6ac01e06d3426fbae8..13e60bc13cd80aca4957db4c198bb12e61c8a3d7 100644
--- a/test/cctest/compiler/test-control-reducer.cc
+++ b/test/cctest/compiler/test-control-reducer.cc
@@ -64,7 +64,7 @@ class ControlReducerTester : HandleAndZoneScope {
       : isolate(main_isolate()),
         common(main_zone()),
         graph(main_zone()),
-        jsgraph(&graph, &common, NULL, NULL),
+        jsgraph(main_isolate(), &graph, &common, NULL, NULL),
         start(graph.NewNode(common.Start(1))),
         end(graph.NewNode(common.End(), start)),
         p0(graph.NewNode(common.Parameter(0), start)),