[Sync] Remove unncessary nudge in UpdateCredentials that can cause issues.
[Sync] Remove unncessary nudge in UpdateCredentials that can cause issues.

BUG=52802
TEST=sync continues to work

Review URL: http://codereview.chromium.org/6621015

git-svn-id: http://src.chromium.org/svn/trunk/src@77358 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d50176f65b027af97eeead7225793e3a30a0247a
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