Move unit tests to test/unittests.

test/unittests/compiler/simplified-operator-reducer-unittest.cc

Index: test/unittests/compiler/simplified-operator-reducer-unittest.cc
diff --git a/src/compiler/simplified-operator-reducer-unittest.cc b/test/unittests/compiler/simplified-operator-reducer-unittest.cc
similarity index 99%
rename from src/compiler/simplified-operator-reducer-unittest.cc
rename to test/unittests/compiler/simplified-operator-reducer-unittest.cc
index 739264ed432d60c41e0436ee666d33b6227f0f95..fb097311641d269e972aba5efed8660aa95d883f 100644
--- a/src/compiler/simplified-operator-reducer-unittest.cc
+++ b/test/unittests/compiler/simplified-operator-reducer-unittest.cc
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/compiler/graph-unittest.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/compiler/simplified-operator-reducer.h"
 #include "src/compiler/typer.h"
 #include "src/conversions.h"
+#include "test/unittests/compiler/graph-unittest.h"
 
 namespace v8 {
 namespace internal {