Removed most of the bogus CompilationInfo constructor calls.

test/unittests/compiler/change-lowering-unittest.cc

Index: test/unittests/compiler/change-lowering-unittest.cc
diff --git a/test/unittests/compiler/change-lowering-unittest.cc b/test/unittests/compiler/change-lowering-unittest.cc
index 8757c68a90d83b0e6d56051e3e5dd969c8635459..5b31f5e04cc90bd6e6af0de5d9969c565977da94 100644
--- a/test/unittests/compiler/change-lowering-unittest.cc
+++ b/test/unittests/compiler/change-lowering-unittest.cc
@@ -67,9 +67,7 @@ class ChangeLoweringTest : public GraphTest {
     MachineOperatorBuilder machine(zone(), WordRepresentation());
     JSOperatorBuilder javascript(zone());
     JSGraph jsgraph(isolate(), graph(), common(), &javascript, &machine);
-    CompilationInfo info(isolate(), zone());
-    Linkage linkage(zone(), &info);
-    ChangeLowering reducer(&jsgraph, &linkage);
+    ChangeLowering reducer(&jsgraph);
     return reducer.Reduce(node);
   }