Reland of Moving previews code from components/ to chrome/

components/previews/core/previews_experiments_unittest.cc

Index: components/previews/core/previews_experiments_unittest.cc
diff --git a/components/previews/core/previews_experiments_unittest.cc b/components/previews/core/previews_experiments_unittest.cc
index faf92ccaa05cc61baaf8d2385a0b6359e64b8df0..f96fb55a4c74e2a894109f4d04dd29bc4b298b43 100644
--- a/components/previews/core/previews_experiments_unittest.cc
+++ b/components/previews/core/previews_experiments_unittest.cc
@@ -145,13 +145,13 @@ void VerifyNewParams() {
 // Verifies that we can enable offline previews via field trial.
 TEST_F(PreviewsExperimentsTest, TestFieldTrialOfflinePage) {
   EXPECT_FALSE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_FALSE(IsPreviewsTypeEnabled(PreviewsType::OFFLINE));
+  EXPECT_FALSE(params::IsOfflinePreviewsEnabled());
 
   base::FieldTrialList field_trial_list(nullptr);
   ASSERT_TRUE(EnableOfflinePreviewsForTesting());
 
   EXPECT_TRUE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_TRUE(IsPreviewsTypeEnabled(PreviewsType::OFFLINE));
+  EXPECT_TRUE(params::IsOfflinePreviewsEnabled());
   variations::testing::ClearAllVariationParams();
 }