Fix to AutoFill sql Crash Report
Fix to AutoFill sql Crash Report

Fix for Crash Report: http://go/crash/reportdetail?reportid=7ea9ff0f4697aa57
The AutoFill sql assertion logic was constructing an std::string from 0 when invalid data was encountered.  This caused a c++ exception and then program termination.  Correct logic is to return empty string.  Note, this fix does not address the underlying database corruption, only the crash.

BUG=38241
TEST=none


Review URL: http://codereview.chromium.org/1016004

git-svn-id: http://src.chromium.org/svn/trunk/src@41757 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ef34c10e75aeebeefac755d7c00c78040ae7cb30
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser