[DevTools] Fix Application Panel initial selection

[DevTools] Fix Application Panel initial selection

1. Select manifest panel if there's no stored selection.
2. Fix selection restoration for the top-level tree items.
3. Parent element will now be selected if selection cannot be restored
   because the element have been gone from the tree.

BUG=722716
Review-Url: https://codereview.chromium.org/2887183002
Cr-Commit-Position: refs/heads/master@{#472874}
Committed: https://chromium.googlesource.com/chromium/src/+/d0471f6d597b98fb255a0190751c9ccc0636d09e

[eostroukhov, 2017-05-17 19:24:33]

eostroukhov@chromium.org changed reviewers:
+ caseq@chromium.org, dgozman@chromium.org

[dgozman, 2017-05-17 21:03:02]

lgtm

[eostroukhov, 2017-05-17 21:24:21]

The CQ bit was checked by eostroukhov@chromium.org

[commit-bot: I haz the power, 2017-05-17 21:25:36]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-18 00:14:38]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-18 00:14:40]

Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[eostroukhov, 2017-05-18 15:37:17]

The CQ bit was checked by eostroukhov@chromium.org

[commit-bot: I haz the power, 2017-05-18 15:38:18]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-18 18:14:13]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495121837733670, "parent_rev":
"4489cf4203527eb29aa976563a48157cf273a5ad", "commit_rev":
"d0471f6d597b98fb255a0190751c9ccc0636d09e"}

[commit-bot: I haz the power, 2017-05-18 18:14:25]

Description was changed from

==========
[DevTools] Fix Application Panel initial selection

1. Select manifest panel if there's no stored selection.
2. Fix selection restoration for the top-level tree items.
3. Parent element will now be selected if selection cannot be restored
   because the element have been gone from the tree.

BUG=722716
==========

to

==========
[DevTools] Fix Application Panel initial selection

1. Select manifest panel if there's no stored selection.
2. Fix selection restoration for the top-level tree items.
3. Parent element will now be selected if selection cannot be restored
   because the element have been gone from the tree.

BUG=722716

Review-Url: https://codereview.chromium.org/2887183002
Cr-Commit-Position: refs/heads/master@{#472874}
Committed:
https://chromium.googlesource.com/chromium/src/+/d0471f6d597b98fb255a0190751c...
==========

[commit-bot: I haz the power, 2017-05-18 18:14:26]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/d0471f6d597b98fb255a0190751c...