Generalize Previews Type code

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 1ceb4c6a9eda18f4fabd6c47aa8295053c40baa5..e5d957358c2176b55e6b2b3582e021277c7b613f 100644
--- a/components/previews/core/previews_experiments_unittest.cc
+++ b/components/previews/core/previews_experiments_unittest.cc
@@ -10,20 +10,20 @@
 namespace {
 
 using PreviewsExperimentsTest = testing::Test;
 
 }  // namespace
 
 namespace previews {
 
 TEST_F(PreviewsExperimentsTest, TestFieldTrialOfflinePage) {
   EXPECT_FALSE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_FALSE(IsOfflinePreviewsEnabled());
+  EXPECT_FALSE(IsPreviewsTypeEnabled(PreviewsType::OFFLINE));
 
   base::FieldTrialList field_trial_list(nullptr);
   ASSERT_TRUE(EnableOfflinePreviewsForTesting());
 
   EXPECT_TRUE(IsIncludedInClientSidePreviewsExperimentsFieldTrial());
-  EXPECT_TRUE(IsOfflinePreviewsEnabled());
+  EXPECT_TRUE(IsPreviewsTypeEnabled(PreviewsType::OFFLINE));
 }
 
 }  // namespace previews