Add support to previews/ for Server LoFi and LitePages

components/previews/core/previews_io_data_unittest.cc

Index: components/previews/core/previews_io_data_unittest.cc
diff --git a/components/previews/core/previews_io_data_unittest.cc b/components/previews/core/previews_io_data_unittest.cc
index 23b1bac9a3a2007ad4e929db67761845c9aa64fa..beb12beaeacf7866458aebf7f7dba798437942d3 100644
--- a/components/previews/core/previews_io_data_unittest.cc
+++ b/components/previews/core/previews_io_data_unittest.cc
@@ -222,6 +222,12 @@ TEST_F(PreviewsIODataTest, TestShouldAllowPreview) {
       "Previews.EligibilityReason.Offline",
       static_cast<int>(PreviewsEligibilityReason::NETWORK_NOT_SLOW), 1);
 
+  // LitePage makes its own decision about network quality.
+  EXPECT_TRUE(io_data()->ShouldAllowPreview(*request, PreviewsType::LITE_PAGE));
+  histogram_tester.ExpectBucketCount(
+      "Previews.EligibilityReason.LitePage",
+      static_cast<int>(PreviewsEligibilityReason::ALLOWED), 1);
+
   // Set NQE type to slow.
   network_quality_estimator.set_effective_connection_type(
       net::EFFECTIVE_CONNECTION_TYPE_SLOW_2G);
@@ -230,9 +236,14 @@ TEST_F(PreviewsIODataTest, TestShouldAllowPreview) {
   EXPECT_FALSE(io_data()->ShouldAllowPreview(*request, PreviewsType::OFFLINE));
   histogram_tester.ExpectBucketCount(
       "Previews.EligibilityReason.Offline",
-      static_cast<int>(
-          PreviewsEligibilityReason::RELOAD_DISALLOWED_FOR_OFFLINE),
-      1);
+      static_cast<int>(PreviewsEligibilityReason::RELOAD_DISALLOWED), 1);
+
+  // Server LoFi ignores reload when deciding to show the preview.
+  EXPECT_TRUE(
+      io_data()->ShouldAllowPreview(*request, PreviewsType::SERVER_LOFI));
+  histogram_tester.ExpectBucketCount(
+      "Previews.EligibilityReason.ServerLoFi",
+      static_cast<int>(PreviewsEligibilityReason::ALLOWED), 1);
 
   request->SetLoadFlags(0);
   EXPECT_TRUE(io_data()->ShouldAllowPreview(*request, PreviewsType::OFFLINE));