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

sql/test/test_helpers.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sql/test/test_helpers.h"
 
 #include <string>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
@@ skipping 24 matching lines @@
 bool GetRootPage(sql::Connection* db, const char* name, int* page_number) {
   const char kPageSql[] = "SELECT rootpage FROM sqlite_master WHERE name = ?";
   sql::Statement s(db->GetUniqueStatement(kPageSql));
   s.BindString(0, name);
   if (!s.Step())
     return false;
   *page_number = s.ColumnInt(0);
   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) {
   unsigned r = buf[0];
   for (size_t i = 1; i < bytes; i++) {
     r <<= 8;
     r |= buf[i];
   }
   return r;
 }
 
 // Helper for writing a number to the SQLite header.
 void WriteBigEndian(unsigned val, unsigned char* buf, size_t bytes) {
   for (size_t i = 0; i < bytes; i++) {
     buf[bytes - i - 1] = (val & 0xFF);
     val >>= 8;
   }
 }
 
-}  // 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;
   const size_t kPageSizeOffset = 16;
   const size_t kFileChangeCountOffset = 24;
   const size_t kPageCountOffset = 28;
   const size_t kVersionValidForOffset = 92;  // duplicate kFileChangeCountOffset
 
   unsigned char header[kHeaderSize];
 
@@ skipping 164 matching lines @@
   sql::Statement statement(db->GetUniqueStatement("PRAGMA integrity_check"));
 
   // SQLite should always return a row of data.
   EXPECT_TRUE(statement.Step());
 
   return statement.ColumnString(0);
 }
 
 }  // namespace test
 }  // namespace sql