Create variations target that depends on base.

components/variations/entropy_provider_unittest.cc

Index: components/variations/entropy_provider_unittest.cc
===================================================================
--- components/variations/entropy_provider_unittest.cc	(working copy)
+++ components/variations/entropy_provider_unittest.cc	(working copy)
@@ -1,8 +1,8 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/common/metrics/entropy_provider.h"
+#include "components/variations/entropy_provider.h"
 
 #include <cmath>
 #include <limits>
@@ -13,7 +13,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
-#include "chrome/common/metrics/metrics_util.h"
+#include "components/variations/metrics_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace metrics {