Files.app: Minor updates on font size, spacing, and color.

Files.app: Minor updates on font size, spacing, and color.

- Breadcrumb's font is 14px bold.
- Horizontal margin for dialog buttons is slightly expanded.
- Cancel button's color is dark gray.

BUG=470621
TEST=manually

Committed: https://crrev.com/4feb24fc5e5b7033574c61084edce9a9b71d7f66
Cr-Commit-Position: refs/heads/master@{#323670}

[fukino, 2015-04-03 03:07:10]

fukino@chromium.org changed reviewers:
+ yawano@chromium.org

[fukino, 2015-04-03 03:07:10]

PTAL. Thanks!

[yawano, 2015-04-03 03:50:18]

lgtm with nit.
nit: In CL description 14pt should be 14px?

[fukino, 2015-04-03 04:12:45]

On 2015/04/03 03:50:18, yawano wrote:
> lgtm with nit.
> nit: In CL description 14pt should be 14px?

Thanks! I updated the CL description.

[fukino, 2015-04-03 04:12:50]

The CQ bit was checked by fukino@chromium.org

[commit-bot: I haz the power, 2015-04-03 04:44:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1057103004/1

[commit-bot: I haz the power, 2015-04-03 07:51:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-03 20:34:30]

Patchset 1 (id:??) landed as
https://crrev.com/4feb24fc5e5b7033574c61084edce9a9b71d7f66
Cr-Commit-Position: refs/heads/master@{#323670}