Files.app: Add touch feedback on breadcrumbs.

Files.app: Add touch feedback on breadcrumbs.

- When the bread crumbs is updated, we need to keep DOMs for the common path prefix to continue the animation for touch feedback.
- Made each crumbs as <button>, so I removed the unnecessary event listener for 'keydown' in location_line.js.
- Fixed minor issue on truncation algorithm, to prevent crumbs from being too small (smaller than '...').

BUG=446616
TEST=manual test: Check the animation on touch on breadcrumbs, and Check the truncation when window width is changed.

Committed: https://crrev.com/515f0f0dd9faf37b9e1fe03fbb060f98b082c97b
Cr-Commit-Position: refs/heads/master@{#321554}

[fukino, 2015-03-20 10:18:41]

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

[fukino, 2015-03-20 10:18:42]

Could you take a look?
Thank you!

[yawano, 2015-03-20 11:14:30]

lgtm. Thank you!

https://codereview.chromium.org/1026693003/diff/1/ui/file_manager/file_manage...
File ui/file_manager/file_manager/foreground/js/ui/location_line.js (right):

https://codereview.chromium.org/1026693003/diff/1/ui/file_manager/file_manage...
ui/file_manager/file_manager/foreground/js/ui/location_line.js:244: if
(pathWidth == maxPathWidth) {
nit: ===

[fukino, 2015-03-20 11:30:04]

Thank you!

https://codereview.chromium.org/1026693003/diff/1/ui/file_manager/file_manage...
File ui/file_manager/file_manager/foreground/js/ui/location_line.js (right):

https://codereview.chromium.org/1026693003/diff/1/ui/file_manager/file_manage...
ui/file_manager/file_manager/foreground/js/ui/location_line.js:244: if
(pathWidth == maxPathWidth) {
On 2015/03/20 11:14:30, yawano wrote:
> nit: ===

Done.

[fukino, 2015-03-20 11:30:11]

The CQ bit was checked by fukino@chromium.org

[fukino, 2015-03-20 11:30:11]

The patchset sent to the CQ was uploaded after l-g-t-m from yawano@chromium.org
Link to the patchset: https://codereview.chromium.org/1026693003/#ps20001
(title: "== -> ===")

[commit-bot: I haz the power, 2015-03-20 11:30:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1026693003/20001

[commit-bot: I haz the power, 2015-03-20 12:03:55]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-20 12:04:36]

Patchset 2 (id:??) landed as
https://crrev.com/515f0f0dd9faf37b9e1fe03fbb060f98b082c97b
Cr-Commit-Position: refs/heads/master@{#321554}