Changed previews component to be a layered component.

components/previews/previews_experiments_unittest.cc

Index: components/previews/previews_experiments_unittest.cc
diff --git a/components/previews/previews_experiments_unittest.cc b/components/previews/previews_experiments_unittest.cc
deleted file mode 100644
index c66e2e0ab97d4d1f0cd3051f81ded9780dd519fd..0000000000000000000000000000000000000000
--- a/components/previews/previews_experiments_unittest.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2016 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 "components/previews/previews_experiments.h"
-
-#include "base/metrics/field_trial.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-using PreviewsExperimentsTest = testing::Test;
-
-}  // namespace
-
-namespace previews {
-
-TEST_F(PreviewsExperimentsTest, TestFieldTrialOfflinePage) {
-  EXPECT_FALSE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_FALSE(IsOfflinePreviewsEnabled());
-
-  base::FieldTrialList field_trial_list(nullptr);
-  ASSERT_TRUE(EnableOfflinePreviewsForTesting());
-
-  EXPECT_TRUE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_TRUE(IsOfflinePreviewsEnabled());
-}
-
-}  // namespace previews