Upgrade V8 to version 4.9.385.28

https://chromium.googlesource.com/v8/v8/+/4.9.385.28

FPIIM-449

Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/unittests/compiler/load-elimination-unittest.cc b/test/unittests/compiler/load-elimination-unittest.cc
index f0cd60e..3ad11cf 100644
--- a/test/unittests/compiler/load-elimination-unittest.cc
+++ b/test/unittests/compiler/load-elimination-unittest.cc
@@ -15,11 +15,13 @@
 class LoadEliminationTest : public GraphTest {
  public:
   LoadEliminationTest() : GraphTest(3), simplified_(zone()) {}
-  ~LoadEliminationTest() OVERRIDE {}
+  ~LoadEliminationTest() override {}
 
  protected:
   Reduction Reduce(Node* node) {
-    LoadElimination reducer;
+    // TODO(titzer): mock the GraphReducer here for better unit testing.
+    GraphReducer graph_reducer(zone(), graph());
+    LoadElimination reducer(&graph_reducer);
     return reducer.Reduce(node);
   }