mandoline filesystem: add a sqlite3 vfs to proxy filesystem usage.

sql/test/test_helpers.cc

Index: sql/test/test_helpers.cc
diff --git a/sql/test/test_helpers.cc b/sql/test/test_helpers.cc
index 361b336452e6cf074583551b237d268d0d249a28..7e61cf2882d4d054d524c53474c887853eb97836 100644
--- a/sql/test/test_helpers.cc
+++ b/sql/test/test_helpers.cc
@@ -42,6 +42,11 @@ bool GetRootPage(sql::Connection* db, const char* name, int* page_number) {
   return true;
 }
 
+}  // namespace
+
+namespace sql {
+namespace test {
+
 // Helper for reading a number from the SQLite header.
 // See base/big_endian.h.
 unsigned ReadBigEndian(unsigned char* buf, size_t bytes) {
@@ -61,11 +66,6 @@ void WriteBigEndian(unsigned val, unsigned char* buf, size_t bytes) {
   }
 }
 
-}  // namespace
-
-namespace sql {
-namespace test {
-
 bool CorruptSizeInHeader(const base::FilePath& db_path) {
   // See http://www.sqlite.org/fileformat.html#database_header
   const size_t kHeaderSize = 100;