[sql] Verify control of close-time WAL checkpoint.

sql/connection.h

Index: sql/connection.h
diff --git a/sql/connection.h b/sql/connection.h
index 639c333ed4de7cc6e90d7a3605e7e7deb95135ba..838d552cdfd7fa1c9abe2934d5b0c6ab7f035890 100644
--- a/sql/connection.h
+++ b/sql/connection.h
@@ -527,6 +527,7 @@ class SQL_EXPORT Connection {
   FRIEND_TEST_ALL_PREFIXES(SQLConnectionTest, GetAppropriateMmapSizeAltStatus);
   FRIEND_TEST_ALL_PREFIXES(SQLConnectionTest, OnMemoryDump);
   FRIEND_TEST_ALL_PREFIXES(SQLConnectionTest, RegisterIntentToUpload);
+  FRIEND_TEST_ALL_PREFIXES(SQLiteFeaturesTest, WALNoClose);
 
   // Internal initialize function used by both Init and InitInMemory. The file
   // name is always 8 bits since we want to use the 8-bit version of