Labeling as M-63 as this should be a quick fix! Please let me know if otherwise.

Marianne, could you take this?

As long as I don't have to pay attention to language, this should be done :)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4ce92a11414d26c93b51969aa8f97b512fbbaff9

commit 4ce92a11414d26c93b51969aa8f97b512fbbaff9
Author: mariannet <mariannet@google.com>
Date: Wed Oct 11 04:50:55 2017

Update the "Dimension" string for image metadata to be "Dimensions".
If I don't have to care about language, that should be it, I guess

Bug:  769840 
Test: manually
Change-Id: Iec63d5675ebd5548fe63c05edbdf8018fb0a9b58
Reviewed-on: https://chromium-review.googlesource.com/697228
Commit-Queue: Marianne Thieffry <mariannet@google.com>
Reviewed-by: Keigo Oka <oka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507894}
[modify] https://crrev.com/4ce92a11414d26c93b51969aa8f97b512fbbaff9/chrome/app/chromeos_strings.grdp