Reland of DevTools: properly restore selected DOMNode in Elements panel.

Reland of DevTools: properly restore selected DOMNode in Elements panel.

This patch is a reland of https://crrev.com/2428823002/, merged with
https://crrev.com/2448963003.

Since the http://crrev.com/b4d6bf98e, we started
sending two "documentUpdated" events for every
page reload.

It's not a bad thing by itself (but probably needs
addressing in a follow-up), but the element restoration
logic is unprepared for this.

This patch re-writes the element restoring logic in the
elements panel so that we will try to restore to the last
focused selected element.

BUG=645645
R=dgozman

Review-Url: https://codereview.chromium.org/2449963004
Cr-Commit-Position: refs/heads/master@{#427715}
(cherry picked from commit f19c680112d1d6fc029b1463ceeb35b7a54297a4)

Committed: https://chromium.googlesource.com/chromium/src/+/36953eb34894422291cafa59f499fc27a74d7adf

[lushnikov, 2016-10-28 22:32:48]

Description was changed from

==========
Reland of DevTools: properly restore selected DOMNode in Elements panel.

This patch is a reland of https://crrev.com/2428823002/, merged with
https://crrev.com/2448963003.

Since the http://crrev.com/b4d6bf98e, we started
sending two "documentUpdated" events for every
page reload.

It's not a bad thing by itself (but probably needs
addressing in a follow-up), but the element restoration
logic is unprepared for this.

This patch re-writes the element restoring logic in the
elements panel so that we will try to restore to the last
focused selected element.

BUG=645645
R=dgozman

Review-Url: https://codereview.chromium.org/2449963004
Cr-Commit-Position: refs/heads/master@{#427715}
(cherry picked from commit f19c680112d1d6fc029b1463ceeb35b7a54297a4)
==========

to

==========
Reland of DevTools: properly restore selected DOMNode in Elements panel.

This patch is a reland of https://crrev.com/2428823002/, merged with
https://crrev.com/2448963003.

Since the http://crrev.com/b4d6bf98e, we started
sending two "documentUpdated" events for every
page reload.

It's not a bad thing by itself (but probably needs
addressing in a follow-up), but the element restoration
logic is unprepared for this.

This patch re-writes the element restoring logic in the
elements panel so that we will try to restore to the last
focused selected element.

BUG=645645
R=dgozman

Review-Url: https://codereview.chromium.org/2449963004
Cr-Commit-Position: refs/heads/master@{#427715}
(cherry picked from commit f19c680112d1d6fc029b1463ceeb35b7a54297a4)

Committed:
https://chromium.googlesource.com/chromium/src/+/36953eb34894422291cafa59f499...
==========

[lushnikov, 2016-10-28 22:32:49]

Committed patchset #1 (id:1) manually as
36953eb34894422291cafa59f499fc27a74d7adf.