(Copy of previous CL that existed in a client I lost)
(Copy of previous CL that existed in a client I lost)

- Don't treat the body of an "authentication required" response as a valid dictionary!
- In the event of a 200 status code, check the response actually looks like a dictionary.

BUG=24486
TEST=Verified the appearance of new dictionaries after changing spell-check language; verified spell-checking on new dictionaries.
TBR=sidchat

Review URL: http://codereview.chromium.org/295014

git-svn-id: http://src.chromium.org/svn/trunk/src@29471 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: bc1ae9df2e3079f786e0dcd91335d1549193a0b3
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