Get rid of MetaTableHelper class and make use of the app/sql API in the LoginDatabase.

app/sql/statement.h

Index: app/sql/statement.h
diff --git a/app/sql/statement.h b/app/sql/statement.h
index 22682c8274b10a4e8da21d357a28a914c4fbcb4b..0fbbfba93d269ad4c6aedcd5d6164043e8d218e9 100644
--- a/app/sql/statement.h
+++ b/app/sql/statement.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -11,6 +11,7 @@
 #include "app/sql/connection.h"
 #include "base/basictypes.h"
 #include "base/ref_counted.h"
+#include "base/string16.h"
 
 namespace sql {
 
@@ -104,6 +105,7 @@ class Statement {
   bool BindDouble(int col, double val);
   bool BindCString(int col, const char* val);
   bool BindString(int col, const std::string& val);
+  bool BindString16(int col, const string16& value);
   bool BindBlob(int col, const void* value, int value_len);
 
   // Retrieving ----------------------------------------------------------------
@@ -125,12 +127,14 @@ class Statement {
   int64 ColumnInt64(int col) const;
   double ColumnDouble(int col) const;
   std::string ColumnString(int col) const;
+  string16 ColumnString16(int col) const;
 
   // When reading a blob, you can get a raw pointer to the underlying data,
   // along with the length, or you can just ask us to copy the blob into a
   // vector. Danger! ColumnBlob may return NULL if there is no data!
   int ColumnByteLength(int col) const;
   const void* ColumnBlob(int col) const;
+  bool ColumnBlobAsString(int col, std::string* blob);
   void ColumnBlobAsVector(int col, std::vector<char>* val) const;
   void ColumnBlobAsVector(int col, std::vector<unsigned char>* val) const;