Better remove HistoryNodes

content/common/page_state_serialization_unittest.cc

Index: content/common/page_state_serialization_unittest.cc
diff --git a/content/common/page_state_serialization_unittest.cc b/content/common/page_state_serialization_unittest.cc
index f860b215747ababa11d03784da9273ea838cb52d..9f58c7643d4c891b1aacd7bf26df1d89d3f9a19b 100644
--- a/content/common/page_state_serialization_unittest.cc
+++ b/content/common/page_state_serialization_unittest.cc
@@ -106,7 +106,6 @@ class PageStateSerializationTest : public testing::Test {
     frame_state->scroll_offset = gfx::Point(0, 100);
     frame_state->item_sequence_number = 1;
     frame_state->document_sequence_number = 2;
-    frame_state->frame_sequence_number = 3;
     frame_state->page_scale_factor = 2.0;
   }
 
@@ -147,7 +146,6 @@ class PageStateSerializationTest : public testing::Test {
     frame_state->scroll_offset = gfx::Point(42, -42);
     frame_state->item_sequence_number = 123;
     frame_state->document_sequence_number = 456;
-    frame_state->frame_sequence_number = 789;
     frame_state->page_scale_factor = 2.0f;
 
     frame_state->document_state.push_back(
@@ -437,5 +435,9 @@ TEST_F(PageStateSerializationTest, BackwardsCompat_v21) {
   TestBackwardsCompat(21);
 }
 
+TEST_F(PageStateSerializationTest, BackwardsCompat_v22) {
+  TestBackwardsCompat(22);
+}
+
 }  // namespace
 }  // namespace content