AutoFill memory exception when deleting text from a filled form
AutoFill memory exception when deleting text from a filled form

Changes duplicate removal logic to avoid erasure of missing unique_id element.

BUG=49872
TEST=Manual test as per bug.

Review URL: http://codereview.chromium.org/3031018

git-svn-id: http://src.chromium.org/svn/trunk/src@53396 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2861b48e183ef57529202bbb9a1534809d8e6bc6
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