Changes dip conversions to ceil size and floor origin

Changes dip conversions to ceil size and floor origin

This way the size should always remain the same regardless of the
origin. Also, it's important that we ceil here otherwise a round trip
for DIP to screen to DIP could result in a smaller value resulting in
all sorts of wierdness.

BUG=417392
TEST=see bug
R=ananta@chromium.org

Committed: https://crrev.com/e9bc87f33688e6b8f9bdaa71031ad07fb6da086c
Cr-Commit-Position: refs/heads/master@{#296559}

[sky, 2014-09-24 19:59:19]

I wanted to remove these, but they are used in a number of places. I'm going to
look into that separately.

[ananta, 2014-09-24 22:04:46]

lgtm

[sky, 2014-09-24 22:08:13]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-09-24 22:09:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/600103002/20001

[commit-bot: I haz the power, 2014-09-24 23:32:32]

Committed patchset #2 (id:20001) as ebe3380bd6e449463ff6c3972a07dca8f8dd0875

[commit-bot: I haz the power, 2014-09-24 23:46:55]

Patchset 2 (id:??) landed as
https://crrev.com/e9bc87f33688e6b8f9bdaa71031ad07fb6da086c
Cr-Commit-Position: refs/heads/master@{#296559}