[Files.app] Use dictionary-way to access Entry.cachedUrl

[Files.app] Use dictionary-way to access Entry.cachedUrl

Entry.cachedUrl is not standard property and the closure compiler detected it as an error. To prevent the error, we need to access it with dictionary-way (using brackets).

BUG=448263
TEST=none

Committed: https://crrev.com/9dd3b7f9c09d32aa6fa914ac48e85df2f9de4437
Cr-Commit-Position: refs/heads/master@{#320873}

[yoshiki, 2015-03-17 05:02:33]

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

[yoshiki, 2015-03-17 05:02:57]

@fukino-san, PTAL. Thanks.,

[fukino, 2015-03-17 05:14:20]

lgtm.

[yoshiki, 2015-03-17 05:19:59]

The CQ bit was checked by yoshiki@chromium.org

[commit-bot: I haz the power, 2015-03-17 05:20:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1013973002/1

[commit-bot: I haz the power, 2015-03-17 05:47:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-17 05:49:18]

Patchset 1 (id:??) landed as
https://crrev.com/9dd3b7f9c09d32aa6fa914ac48e85df2f9de4437
Cr-Commit-Position: refs/heads/master@{#320873}