Increase page size for SyncData DB from 4K to maximum supported 32K

sync/syncable/directory_backing_store_unittest.cc

Index: sync/syncable/directory_backing_store_unittest.cc
diff --git a/sync/syncable/directory_backing_store_unittest.cc b/sync/syncable/directory_backing_store_unittest.cc
index 8f679f170d17f3dfbfcc9517d2ef0871561f5c31..56828b4ca55e2f55abd774a4020ed2485821553f 100644
--- a/sync/syncable/directory_backing_store_unittest.cc
+++ b/sync/syncable/directory_backing_store_unittest.cc
@@ -18,6 +18,7 @@
 #include "sync/internal_api/public/base/node_ordinal.h"
 #include "sync/protocol/bookmark_specifics.pb.h"
 #include "sync/protocol/sync.pb.h"
+#include "sync/syncable/directory.h"
 #include "sync/syncable/directory_backing_store.h"
 #include "sync/syncable/on_disk_directory_backing_store.h"
 #include "sync/syncable/syncable-inl.h"
@@ -3953,5 +3954,44 @@ TEST_F(DirectoryBackingStoreTest, GenerateCacheGUID) {
   EXPECT_NE(guid1, guid2);
 }
 
+TEST_F(DirectoryBackingStoreTest, IncreaseDatabasePageSizeFrom4KTo32K) {
+  sql::Connection connection;
+  ASSERT_TRUE(connection.Open(GetDatabasePath()));
+
+  SetUpCurrentDatabaseAndCheckVersion(&connection);
+  scoped_ptr<TestDirectoryBackingStore> dbs(
+      new TestDirectoryBackingStore(GetUsername(), &connection));
+  Directory::MetahandlesMap handles_map;
+  JournalIndex delete_journals;
+  Directory::KernelLoadInfo kernel_load_info;
+  STLValueDeleter<Directory::MetahandlesMap> index_deleter(&handles_map);
+
+  DirOpenResult open_result =
+      dbs->Load(&handles_map, &delete_journals, &kernel_load_info);
+  EXPECT_EQ(open_result, OPENED);
+
+  // Check if update is successful.
+  int pageSize = 0;
+  dbs->GetDatabasePageSize(&pageSize);
+  EXPECT_EQ(1024, pageSize);
+  dbs->db_->set_page_size(32768);
+  dbs->IncreasePageSizeTo32K();
+  pageSize = 0;
+  dbs->GetDatabasePageSize(&pageSize);
+  EXPECT_EQ(32768, pageSize);
+
+  // Snapshot and save.
+  Directory::SaveChangesSnapshot snapshot;
+  dbs->SaveChanges(snapshot);
+
+  // Load the directory again.
+  dbs.reset(new TestDirectoryBackingStore(GetUsername(), &connection));
+  pageSize = 0;
+  dbs->GetDatabasePageSize(&pageSize);
+  EXPECT_EQ(32768, pageSize);
+  open_result = dbs->Load(&handles_map, &delete_journals, &kernel_load_info);
+  EXPECT_EQ(open_result, OPENED);
+}
+
 }  // namespace syncable
 }  // namespace syncer