Create variations target that depends on base.

chrome/browser/history/most_visited_tiles_experiment_unittest.cc

 // 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/browser/history/most_visited_tiles_experiment.h"
 
 #include <algorithm>
 #include <sstream>
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/common/instant_types.h"
-#include "chrome/common/metrics/entropy_provider.h"
+#include "components/variations/entropy_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace history {
 
 namespace {
 
 // Constants for the most visited tile placement field trial.
 // See field trial config (MostVisitedTilePlacement.json) for details.
 const char kMostVisitedFieldTrialName[] = "MostVisitedTilePlacement";
@@ skipping 321 matching lines @@
            test_urls[TILE_ONE].url.spec());
   EXPECT_EQ(most_visited_urls[TILE_FOUR-1].url.spec(),
             test_urls[TILE_FOUR-1].url.spec());
 
   // Ensure counts are correct.
   EXPECT_NO_FATAL_FAILURE(
       ValidateMetrics(NTP_TILE_EXPERIMENT_ACTION_TOO_FEW_URLS_TILES_1_4));
 }
 
 }  // namespace history