ash: Avoid reloading already-resized custom wallpaper.

Avoid a white flash at startup caused by
DesktopBackgroundController comparing the resized version of
a custom wallpaper image against the original image, seeing
that they are different, and then resizing the original
image again.

BUG=321402

Review URL: https://codereview.chromium.org/81393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236852 0039d316-1c4b-4281-b951-d872f2087c98
Docserver: Fix enum name rendering.

BUG=322700
R=rockot@chromium.org

Review URL: https://codereview.chromium.org/82583008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236853 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236853