Iterate an array in O(n) rather than O(n^2) time during IDBKey conversion.
Iterate an array in O(n) rather than O(n^2) time during IDBKey conversion.

BUG=112016
TEST=third_party/WebKit/LayoutTests/storage/indexeddb/key-type-array.html


Review URL: http://codereview.chromium.org/9104026

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@119956 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,adobe/chromium